21290906

素因数分解:

$2^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 21287014

約数列:

[1, 2, 7, 13, 14, 19, 26, 38, 47, 91, 94, 131, 133, 182, 247, 262, 266, 329, 494, 611, 658, 893, 917, 1222, 1703, 1729, 1786, 1834, 2489, 3406, 3458, 4277, 4978, 6157, 6251, 8554, 11609, 11921, 12314, 12502, 17423, 23218, 23842, 32357, 34846, 43099, 64714, 80041, 81263, 86198, 116983, 160082, 162526, 226499, 233966, 452998, 560287, 818881, 1120574, 1520779, 1637762, 3041558, 10645453, 21290906]

約数ペア:

[(1, 21290906), (2, 10645453), (7, 3041558), (13, 1637762), (14, 1520779), (19, 1120574), (26, 818881), (38, 560287), (47, 452998), (91, 233966), (94, 226499), (131, 162526), (133, 160082), (182, 116983), (247, 86198), (262, 81263), (266, 80041), (329, 64714), (494, 43099), (611, 34846), (658, 32357), (893, 23842), (917, 23218), (1222, 17423), (1703, 12502), (1729, 12314), (1786, 11921), (1834, 11609), (2489, 8554), (3406, 6251), (3458, 6157), (4277, 4978)]