12781025

素因数分解:

$5^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:134

約数の個数: 36

約数和(自身を含む): 17701620

約数和(自身を除く): 4920595

約数列:

[1, 5, 17, 25, 29, 61, 85, 145, 289, 305, 425, 493, 725, 1037, 1445, 1525, 1769, 2465, 5185, 7225, 8381, 8845, 12325, 17629, 25925, 30073, 41905, 44225, 88145, 150365, 209525, 440725, 511241, 751825, 2556205, 12781025]

約数ペア:

[(1, 12781025), (5, 2556205), (17, 751825), (25, 511241), (29, 440725), (61, 209525), (85, 150365), (145, 88145), (289, 44225), (305, 41905), (425, 30073), (493, 25925), (725, 17629), (1037, 12325), (1445, 8845), (1525, 8381), (1769, 7225), (2465, 5185)]