21000265

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{1277}}^1$

素因数の和:1329

約数の個数: 32

約数和(自身を含む): 30917376

約数和(自身を除く): 9917111

約数列:

[1, 5, 11, 13, 23, 55, 65, 115, 143, 253, 299, 715, 1265, 1277, 1495, 3289, 6385, 14047, 16445, 16601, 29371, 70235, 83005, 146855, 182611, 323081, 381823, 913055, 1615405, 1909115, 4200053, 21000265]

約数ペア:

[(1, 21000265), (5, 4200053), (11, 1909115), (13, 1615405), (23, 913055), (55, 381823), (65, 323081), (115, 182611), (143, 146855), (253, 83005), (299, 70235), (715, 29371), (1265, 16601), (1277, 16445), (1495, 14047), (3289, 6385)]