20957535

素因数分解:

$3^5\times 5^1\times {\mathrm{47}}^1\times {\mathrm{367}}^1$

素因数の和:434

約数の個数: 48

約数和(自身を含む): 38578176

約数和(自身を除く): 17620641

約数列:

[1, 3, 5, 9, 15, 27, 45, 47, 81, 135, 141, 235, 243, 367, 405, 423, 705, 1101, 1215, 1269, 1835, 2115, 3303, 3807, 5505, 6345, 9909, 11421, 16515, 17249, 19035, 29727, 49545, 51747, 57105, 86245, 89181, 148635, 155241, 258735, 445905, 465723, 776205, 1397169, 2328615, 4191507, 6985845, 20957535]

約数ペア:

[(1, 20957535), (3, 6985845), (5, 4191507), (9, 2328615), (15, 1397169), (27, 776205), (45, 465723), (47, 445905), (81, 258735), (135, 155241), (141, 148635), (235, 89181), (243, 86245), (367, 57105), (405, 51747), (423, 49545), (705, 29727), (1101, 19035), (1215, 17249), (1269, 16515), (1835, 11421), (2115, 9909), (3303, 6345), (3807, 5505)]