397171420

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{133279}}^1$

素因数の和:133437

約数の個数: 24

約数和(自身を含む): 839664000

約数和(自身を除く): 442492580

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 133279, 266558, 533116, 666395, 1332790, 2665580, 19858571, 39717142, 79434284, 99292855, 198585710, 397171420]

約数ペア:

[(1, 397171420), (2, 198585710), (4, 99292855), (5, 79434284), (10, 39717142), (20, 19858571), (149, 2665580), (298, 1332790), (596, 666395), (745, 533116), (1490, 266558), (2980, 133279)]