21000485

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1$

素因数の和:269

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7891675

約数列:

[1, 5, 11, 31, 55, 109, 113, 155, 341, 545, 565, 1199, 1243, 1705, 3379, 3503, 5995, 6215, 12317, 16895, 17515, 37169, 38533, 61585, 135487, 185845, 192665, 381827, 677435, 1909135, 4200097, 21000485]

約数ペア:

[(1, 21000485), (5, 4200097), (11, 1909135), (31, 677435), (55, 381827), (109, 192665), (113, 185845), (155, 135487), (341, 61585), (545, 38533), (565, 37169), (1199, 17515), (1243, 16895), (1705, 12317), (3379, 6215), (3503, 5995)]