21912555

素因数分解:

$3^1\times 5^1\times 7^3\times {\mathrm{4259}}^1$

素因数の和:4288

約数の個数: 32

約数和(自身を含む): 40896000

約数和(自身を除く): 18983445

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 4259, 5145, 12777, 21295, 29813, 63885, 89439, 149065, 208691, 447195, 626073, 1043455, 1460837, 3130365, 4382511, 7304185, 21912555]

約数ペア:

[(1, 21912555), (3, 7304185), (5, 4382511), (7, 3130365), (15, 1460837), (21, 1043455), (35, 626073), (49, 447195), (105, 208691), (147, 149065), (245, 89439), (343, 63885), (735, 29813), (1029, 21295), (1715, 12777), (4259, 5145)]