643221640

素因数分解:

$2^3\times 5^1\times {\mathrm{2801}}^1\times {\mathrm{5741}}^1$

素因数の和:8553

約数の個数: 32

約数和(自身を含む): 1448017560

約数和(自身を除く): 804795920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2801, 5602, 5741, 11204, 11482, 14005, 22408, 22964, 28010, 28705, 45928, 56020, 57410, 112040, 114820, 229640, 16080541, 32161082, 64322164, 80402705, 128644328, 160805410, 321610820, 643221640]

約数ペア:

[(1, 643221640), (2, 321610820), (4, 160805410), (5, 128644328), (8, 80402705), (10, 64322164), (20, 32161082), (40, 16080541), (2801, 229640), (5602, 114820), (5741, 112040), (11204, 57410), (11482, 56020), (14005, 45928), (22408, 28705), (22964, 28010)]