21381264

素因数分解:

$2^4\times 3^2\times {\mathrm{37}}^1\times {\mathrm{4013}}^1$

素因数の和:4064

約数の個数: 60

約数和(自身を含む): 61470396

約数和(自身を除く): 40089132

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 37, 48, 72, 74, 111, 144, 148, 222, 296, 333, 444, 592, 666, 888, 1332, 1776, 2664, 4013, 5328, 8026, 12039, 16052, 24078, 32104, 36117, 48156, 64208, 72234, 96312, 144468, 148481, 192624, 288936, 296962, 445443, 577872, 593924, 890886, 1187848, 1336329, 1781772, 2375696, 2672658, 3563544, 5345316, 7127088, 10690632, 21381264]

約数ペア:

[(1, 21381264), (2, 10690632), (3, 7127088), (4, 5345316), (6, 3563544), (8, 2672658), (9, 2375696), (12, 1781772), (16, 1336329), (18, 1187848), (24, 890886), (36, 593924), (37, 577872), (48, 445443), (72, 296962), (74, 288936), (111, 192624), (144, 148481), (148, 144468), (222, 96312), (296, 72234), (333, 64208), (444, 48156), (592, 36117), (666, 32104), (888, 24078), (1332, 16052), (1776, 12039), (2664, 8026), (4013, 5328)]