664412

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{389}}^1$

素因数の和:461

約数の個数: 24

約数和(自身を含む): 1354080

約数和(自身を除く): 689668

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 389, 427, 778, 854, 1556, 1708, 2723, 5446, 10892, 23729, 47458, 94916, 166103, 332206, 664412]

約数ペア:

[(1, 664412), (2, 332206), (4, 166103), (7, 94916), (14, 47458), (28, 23729), (61, 10892), (122, 5446), (244, 2723), (389, 1708), (427, 1556), (778, 854)]