21865145

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{4217}}^1$

素因数の和:4300

約数の個数: 16

約数和(自身を含む): 28243728

約数和(自身を除く): 6378583

約数列:

[1, 5, 17, 61, 85, 305, 1037, 4217, 5185, 21085, 71689, 257237, 358445, 1286185, 4373029, 21865145]

約数ペア:

[(1, 21865145), (5, 4373029), (17, 1286185), (61, 358445), (85, 257237), (305, 71689), (1037, 21085), (4217, 5185)]