19899926720

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^2\times {\mathrm{163}}^1\times {\mathrm{397}}^1$

素因数の和:639

約数の個数: 168

約数和(自身を含む): 49389103152

約数和(自身を除く): 29489176432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 163, 248, 310, 320, 326, 397, 496, 620, 652, 794, 815, 961, 992, 1240, 1304, 1588, 1630, 1922, 1984, 1985, 2480, 2608, 3176, 3260, 3844, 3970, 4805, 4960, 5053, 5216, 6352, 6520, 7688, 7940, 9610, 9920, 10106, 10432, 12307, 12704, 13040, 15376, 15880, 19220, 20212, 24614, 25265, 25408, 26080, 30752, 31760, 38440, 40424, 49228, 50530, 52160, 61504, 61535, 63520, 64711, 76880, 80848, 98456, 101060, 123070, 127040, 129422, 153760, 156643, 161696, 196912, 202120, 246140, 258844, 307520, 313286, 323392, 323555, 381517, 393824, 404240, 492280, 517688, 626572, 647110, 763034, 783215, 787648, 808480, 984560, 1035376, 1253144, 1294220, 1526068, 1566430, 1616960, 1907585, 1969120, 2006041, 2070752, 2506288, 2588440, 3052136, 3132860, 3815170, 3938240, 4012082, 4141504, 5012576, 5176880, 6104272, 6265720, 7630340, 8024164, 10025152, 10030205, 10353760, 12208544, 12531440, 15260680, 16048328, 20060410, 20707520, 24417088, 25062880, 30521360, 32096656, 40120820, 50125760, 61042720, 62187271, 64193312, 80241640, 122085440, 124374542, 128386624, 160483280, 248749084, 310936355, 320966560, 497498168, 621872710, 641933120, 994996336, 1243745420, 1989992672, 2487490840, 3979985344, 4974981680, 9949963360, 19899926720]

約数ペア:

[(1, 19899926720), (2, 9949963360), (4, 4974981680), (5, 3979985344), (8, 2487490840), (10, 1989992672), (16, 1243745420), (20, 994996336), (31, 641933120), (32, 621872710), (40, 497498168), (62, 320966560), (64, 310936355), (80, 248749084), (124, 160483280), (155, 128386624), (160, 124374542), (163, 122085440), (248, 80241640), (310, 64193312), (320, 62187271), (326, 61042720), (397, 50125760), (496, 40120820), (620, 32096656), (652, 30521360), (794, 25062880), (815, 24417088), (961, 20707520), (992, 20060410), (1240, 16048328), (1304, 15260680), (1588, 12531440), (1630, 12208544), (1922, 10353760), (1984, 10030205), (1985, 10025152), (2480, 8024164), (2608, 7630340), (3176, 6265720), (3260, 6104272), (3844, 5176880), (3970, 5012576), (4805, 4141504), (4960, 4012082), (5053, 3938240), (5216, 3815170), (6352, 3132860), (6520, 3052136), (7688, 2588440), (7940, 2506288), (9610, 2070752), (9920, 2006041), (10106, 1969120), (10432, 1907585), (12307, 1616960), (12704, 1566430), (13040, 1526068), (15376, 1294220), (15880, 1253144), (19220, 1035376), (20212, 984560), (24614, 808480), (25265, 787648), (25408, 783215), (26080, 763034), (30752, 647110), (31760, 626572), (38440, 517688), (40424, 492280), (49228, 404240), (50530, 393824), (52160, 381517), (61504, 323555), (61535, 323392), (63520, 313286), (64711, 307520), (76880, 258844), (80848, 246140), (98456, 202120), (101060, 196912), (123070, 161696), (127040, 156643), (129422, 153760)]