21958165

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:189

約数の個数: 32

約数和(自身を含む): 28740096

約数和(自身を除く): 6781931

約数列:

[1, 5, 41, 43, 47, 53, 205, 215, 235, 265, 1763, 1927, 2021, 2173, 2279, 2491, 8815, 9635, 10105, 10865, 11395, 12455, 82861, 93439, 102131, 107113, 414305, 467195, 510655, 535565, 4391633, 21958165]

約数ペア:

[(1, 21958165), (5, 4391633), (41, 535565), (43, 510655), (47, 467195), (53, 414305), (205, 107113), (215, 102131), (235, 93439), (265, 82861), (1763, 12455), (1927, 11395), (2021, 10865), (2173, 10105), (2279, 9635), (2491, 8815)]