21281728

素因数分解:

$2^6\times {\mathrm{13}}^1\times {\mathrm{25579}}^1$

素因数の和:25604

約数の個数: 28

約数和(自身を含む): 45481240

約数和(自身を除く): 24199512

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 52, 64, 104, 208, 416, 832, 25579, 51158, 102316, 204632, 332527, 409264, 665054, 818528, 1330108, 1637056, 2660216, 5320432, 10640864, 21281728]

約数ペア:

[(1, 21281728), (2, 10640864), (4, 5320432), (8, 2660216), (13, 1637056), (16, 1330108), (26, 818528), (32, 665054), (52, 409264), (64, 332527), (104, 204632), (208, 102316), (416, 51158), (832, 25579)]