20921186

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{331}}^1$

素因数の和:387

約数の個数: 48

約数和(自身を含む): 39369888

約数和(自身を除く): 18448702

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 143, 169, 187, 221, 286, 331, 338, 374, 442, 662, 1859, 2431, 2873, 3641, 3718, 4303, 4862, 5627, 5746, 7282, 8606, 11254, 31603, 47333, 55939, 61897, 63206, 73151, 94666, 111878, 123794, 146302, 615329, 804661, 950963, 1230658, 1609322, 1901926, 10460593, 20921186]

約数ペア:

[(1, 20921186), (2, 10460593), (11, 1901926), (13, 1609322), (17, 1230658), (22, 950963), (26, 804661), (34, 615329), (143, 146302), (169, 123794), (187, 111878), (221, 94666), (286, 73151), (331, 63206), (338, 61897), (374, 55939), (442, 47333), (662, 31603), (1859, 11254), (2431, 8606), (2873, 7282), (3641, 5746), (3718, 5627), (4303, 4862)]