399805760

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{983}}^1$

素因数の和:1072

約数の個数: 112

約数和(自身を含む): 1007741952

約数和(自身を除く): 607936192

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 41, 62, 64, 80, 82, 124, 155, 160, 164, 205, 248, 310, 320, 328, 410, 496, 620, 656, 820, 983, 992, 1240, 1271, 1312, 1640, 1966, 1984, 2480, 2542, 2624, 3280, 3932, 4915, 4960, 5084, 6355, 6560, 7864, 9830, 9920, 10168, 12710, 13120, 15728, 19660, 20336, 25420, 30473, 31456, 39320, 40303, 40672, 50840, 60946, 62912, 78640, 80606, 81344, 101680, 121892, 152365, 157280, 161212, 201515, 203360, 243784, 304730, 314560, 322424, 403030, 406720, 487568, 609460, 644848, 806060, 975136, 1218920, 1249393, 1289696, 1612120, 1950272, 2437840, 2498786, 2579392, 3224240, 4875680, 4997572, 6246965, 6448480, 9751360, 9995144, 12493930, 12896960, 19990288, 24987860, 39980576, 49975720, 79961152, 99951440, 199902880, 399805760]

約数ペア:

[(1, 399805760), (2, 199902880), (4, 99951440), (5, 79961152), (8, 49975720), (10, 39980576), (16, 24987860), (20, 19990288), (31, 12896960), (32, 12493930), (40, 9995144), (41, 9751360), (62, 6448480), (64, 6246965), (80, 4997572), (82, 4875680), (124, 3224240), (155, 2579392), (160, 2498786), (164, 2437840), (205, 1950272), (248, 1612120), (310, 1289696), (320, 1249393), (328, 1218920), (410, 975136), (496, 806060), (620, 644848), (656, 609460), (820, 487568), (983, 406720), (992, 403030), (1240, 322424), (1271, 314560), (1312, 304730), (1640, 243784), (1966, 203360), (1984, 201515), (2480, 161212), (2542, 157280), (2624, 152365), (3280, 121892), (3932, 101680), (4915, 81344), (4960, 80606), (5084, 78640), (6355, 62912), (6560, 60946), (7864, 50840), (9830, 40672), (9920, 40303), (10168, 39320), (12710, 31456), (13120, 30473), (15728, 25420), (19660, 20336)]