640147690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{703459}}^1$

素因数の和:703486

約数の個数: 32

約数和(自身を含む): 1418175360

約数和(自身を除く): 778027670

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 182, 455, 910, 703459, 1406918, 3517295, 4924213, 7034590, 9144967, 9848426, 18289934, 24621065, 45724835, 49242130, 64014769, 91449670, 128029538, 320073845, 640147690]

約数ペア:

[(1, 640147690), (2, 320073845), (5, 128029538), (7, 91449670), (10, 64014769), (13, 49242130), (14, 45724835), (26, 24621065), (35, 18289934), (65, 9848426), (70, 9144967), (91, 7034590), (130, 4924213), (182, 3517295), (455, 1406918), (910, 703459)]