398261440

素因数分解:

$2^6\times 5^1\times {\mathrm{1244567}}^1$

素因数の和:1244584

約数の個数: 28

約数和(自身を含む): 948360816

約数和(自身を除く): 550099376

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 1244567, 2489134, 4978268, 6222835, 9956536, 12445670, 19913072, 24891340, 39826144, 49782680, 79652288, 99565360, 199130720, 398261440]

約数ペア:

[(1, 398261440), (2, 199130720), (4, 99565360), (5, 79652288), (8, 49782680), (10, 39826144), (16, 24891340), (20, 19913072), (32, 12445670), (40, 9956536), (64, 6222835), (80, 4978268), (160, 2489134), (320, 1244567)]