639380528

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{655103}}^1$

素因数の和:655172

約数の個数: 20

約数和(自身を含む): 1259109888

約数和(自身を除く): 619729360

約数列:

[1, 2, 4, 8, 16, 61, 122, 244, 488, 976, 655103, 1310206, 2620412, 5240824, 10481648, 39961283, 79922566, 159845132, 319690264, 639380528]

約数ペア:

[(1, 639380528), (2, 319690264), (4, 159845132), (8, 79922566), (16, 39961283), (61, 10481648), (122, 5240824), (244, 2620412), (488, 1310206), (976, 655103)]