21386255

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{257}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 30093120

約数和(自身を除く): 8706865

約数列:

[1, 5, 11, 17, 55, 85, 89, 187, 257, 445, 935, 979, 1285, 1513, 2827, 4369, 4895, 7565, 14135, 16643, 21845, 22873, 48059, 83215, 114365, 240295, 251603, 388841, 1258015, 1944205, 4277251, 21386255]

約数ペア:

[(1, 21386255), (5, 4277251), (11, 1944205), (17, 1258015), (55, 388841), (85, 251603), (89, 240295), (187, 114365), (257, 83215), (445, 48059), (935, 22873), (979, 21845), (1285, 16643), (1513, 14135), (2827, 7565), (4369, 4895)]