639781640

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{32843}}^1$

素因数の和:33341

約数の個数: 32

約数和(自身を含む): 1442508480

約数和(自身を除く): 802726840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1948, 2435, 3896, 4870, 9740, 19480, 32843, 65686, 131372, 164215, 262744, 328430, 656860, 1313720, 15994541, 31989082, 63978164, 79972705, 127956328, 159945410, 319890820, 639781640]

約数ペア:

[(1, 639781640), (2, 319890820), (4, 159945410), (5, 127956328), (8, 79972705), (10, 63978164), (20, 31989082), (40, 15994541), (487, 1313720), (974, 656860), (1948, 328430), (2435, 262744), (3896, 164215), (4870, 131372), (9740, 65686), (19480, 32843)]