640976

素因数分解:

$2^4\times 7^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1$

素因数の和:171

約数の個数: 40

約数和(自身を含む): 1458240

約数和(自身を除く): 817264

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 59, 97, 112, 118, 194, 236, 388, 413, 472, 679, 776, 826, 944, 1358, 1552, 1652, 2716, 3304, 5432, 5723, 6608, 10864, 11446, 22892, 40061, 45784, 80122, 91568, 160244, 320488, 640976]

約数ペア:

[(1, 640976), (2, 320488), (4, 160244), (7, 91568), (8, 80122), (14, 45784), (16, 40061), (28, 22892), (56, 11446), (59, 10864), (97, 6608), (112, 5723), (118, 5432), (194, 3304), (236, 2716), (388, 1652), (413, 1552), (472, 1358), (679, 944), (776, 826)]