21487840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:476

約数の個数: 96

約数和(自身を含む): 57425760

約数和(自身を除く): 35937920

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 80, 88, 110, 116, 145, 160, 176, 220, 232, 290, 319, 352, 421, 440, 464, 580, 638, 842, 880, 928, 1160, 1276, 1595, 1684, 1760, 2105, 2320, 2552, 3190, 3368, 4210, 4631, 4640, 5104, 6380, 6736, 8420, 9262, 10208, 12209, 12760, 13472, 16840, 18524, 23155, 24418, 25520, 33680, 37048, 46310, 48836, 51040, 61045, 67360, 74096, 92620, 97672, 122090, 134299, 148192, 185240, 195344, 244180, 268598, 370480, 390688, 488360, 537196, 671495, 740960, 976720, 1074392, 1342990, 1953440, 2148784, 2685980, 4297568, 5371960, 10743920, 21487840]

約数ペア:

[(1, 21487840), (2, 10743920), (4, 5371960), (5, 4297568), (8, 2685980), (10, 2148784), (11, 1953440), (16, 1342990), (20, 1074392), (22, 976720), (29, 740960), (32, 671495), (40, 537196), (44, 488360), (55, 390688), (58, 370480), (80, 268598), (88, 244180), (110, 195344), (116, 185240), (145, 148192), (160, 134299), (176, 122090), (220, 97672), (232, 92620), (290, 74096), (319, 67360), (352, 61045), (421, 51040), (440, 48836), (464, 46310), (580, 37048), (638, 33680), (842, 25520), (880, 24418), (928, 23155), (1160, 18524), (1276, 16840), (1595, 13472), (1684, 12760), (1760, 12209), (2105, 10208), (2320, 9262), (2552, 8420), (3190, 6736), (3368, 6380), (4210, 5104), (4631, 4640)]