405648640

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{10223}}^1$

素因数の和:10275

約数の個数: 72

約数和(自身を含む): 1003097088

約数和(自身を除く): 597448448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 10223, 19840, 20446, 39680, 40892, 51115, 81784, 102230, 163568, 204460, 316913, 327136, 408920, 633826, 654272, 817840, 1267652, 1308544, 1584565, 1635680, 2535304, 2617088, 3169130, 3271360, 5070608, 6338260, 6542720, 10141216, 12676520, 13085440, 20282432, 25353040, 40564864, 50706080, 81129728, 101412160, 202824320, 405648640]

約数ペア:

[(1, 405648640), (2, 202824320), (4, 101412160), (5, 81129728), (8, 50706080), (10, 40564864), (16, 25353040), (20, 20282432), (31, 13085440), (32, 12676520), (40, 10141216), (62, 6542720), (64, 6338260), (80, 5070608), (124, 3271360), (128, 3169130), (155, 2617088), (160, 2535304), (248, 1635680), (256, 1584565), (310, 1308544), (320, 1267652), (496, 817840), (620, 654272), (640, 633826), (992, 408920), (1240, 327136), (1280, 316913), (1984, 204460), (2480, 163568), (3968, 102230), (4960, 81784), (7936, 51115), (9920, 40892), (10223, 39680), (19840, 20446)]