638261104

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{74843}}^1$

素因数の和:74905

約数の個数: 40

約数和(自身を含む): 1364256432

約数和(自身を除く): 725995328

約数列:

[1, 2, 4, 8, 13, 16, 26, 41, 52, 82, 104, 164, 208, 328, 533, 656, 1066, 2132, 4264, 8528, 74843, 149686, 299372, 598744, 972959, 1197488, 1945918, 3068563, 3891836, 6137126, 7783672, 12274252, 15567344, 24548504, 39891319, 49097008, 79782638, 159565276, 319130552, 638261104]

約数ペア:

[(1, 638261104), (2, 319130552), (4, 159565276), (8, 79782638), (13, 49097008), (16, 39891319), (26, 24548504), (41, 15567344), (52, 12274252), (82, 7783672), (104, 6137126), (164, 3891836), (208, 3068563), (328, 1945918), (533, 1197488), (656, 972959), (1066, 598744), (2132, 299372), (4264, 149686), (8528, 74843)]