21989840

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1$

素因数の和:109

約数の個数: 160

約数和(自身を含む): 61067520

約数和(自身を除く): 39077680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 23, 34, 37, 38, 40, 46, 68, 74, 76, 80, 85, 92, 95, 115, 136, 148, 152, 170, 184, 185, 190, 230, 272, 296, 304, 323, 340, 368, 370, 380, 391, 437, 460, 592, 629, 646, 680, 703, 740, 760, 782, 851, 874, 920, 1258, 1292, 1360, 1406, 1480, 1520, 1564, 1615, 1702, 1748, 1840, 1955, 2185, 2516, 2584, 2812, 2960, 3128, 3145, 3230, 3404, 3496, 3515, 3910, 4255, 4370, 5032, 5168, 5624, 6256, 6290, 6460, 6808, 6992, 7030, 7429, 7820, 8510, 8740, 10064, 11248, 11951, 12580, 12920, 13616, 14060, 14467, 14858, 15640, 16169, 17020, 17480, 23902, 25160, 25840, 28120, 28934, 29716, 31280, 32338, 34040, 34960, 37145, 47804, 50320, 56240, 57868, 59432, 59755, 64676, 68080, 72335, 74290, 80845, 95608, 115736, 118864, 119510, 129352, 144670, 148580, 161690, 191216, 231472, 239020, 258704, 274873, 289340, 297160, 323380, 478040, 549746, 578680, 594320, 646760, 956080, 1099492, 1157360, 1293520, 1374365, 2198984, 2748730, 4397968, 5497460, 10994920, 21989840]

約数ペア:

[(1, 21989840), (2, 10994920), (4, 5497460), (5, 4397968), (8, 2748730), (10, 2198984), (16, 1374365), (17, 1293520), (19, 1157360), (20, 1099492), (23, 956080), (34, 646760), (37, 594320), (38, 578680), (40, 549746), (46, 478040), (68, 323380), (74, 297160), (76, 289340), (80, 274873), (85, 258704), (92, 239020), (95, 231472), (115, 191216), (136, 161690), (148, 148580), (152, 144670), (170, 129352), (184, 119510), (185, 118864), (190, 115736), (230, 95608), (272, 80845), (296, 74290), (304, 72335), (323, 68080), (340, 64676), (368, 59755), (370, 59432), (380, 57868), (391, 56240), (437, 50320), (460, 47804), (592, 37145), (629, 34960), (646, 34040), (680, 32338), (703, 31280), (740, 29716), (760, 28934), (782, 28120), (851, 25840), (874, 25160), (920, 23902), (1258, 17480), (1292, 17020), (1360, 16169), (1406, 15640), (1480, 14858), (1520, 14467), (1564, 14060), (1615, 13616), (1702, 12920), (1748, 12580), (1840, 11951), (1955, 11248), (2185, 10064), (2516, 8740), (2584, 8510), (2812, 7820), (2960, 7429), (3128, 7030), (3145, 6992), (3230, 6808), (3404, 6460), (3496, 6290), (3515, 6256), (3910, 5624), (4255, 5168), (4370, 5032)]