645890128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{11807}}^1$

素因数の和:12091

約数の個数: 40

約数和(自身を含む): 1352913408

約数和(自身を除く): 707023280

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 263, 526, 1052, 2104, 3419, 4208, 6838, 11807, 13676, 23614, 27352, 47228, 54704, 94456, 153491, 188912, 306982, 613964, 1227928, 2455856, 3105241, 6210482, 12420964, 24841928, 40368133, 49683856, 80736266, 161472532, 322945064, 645890128]

約数ペア:

[(1, 645890128), (2, 322945064), (4, 161472532), (8, 80736266), (13, 49683856), (16, 40368133), (26, 24841928), (52, 12420964), (104, 6210482), (208, 3105241), (263, 2455856), (526, 1227928), (1052, 613964), (2104, 306982), (3419, 188912), (4208, 153491), (6838, 94456), (11807, 54704), (13676, 47228), (23614, 27352)]