21775475

素因数分解:

$5^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{131}}^1$

素因数の和:311

約数の個数: 24

約数和(自身を含む): 27907440

約数和(自身を除く): 6131965

約数列:

[1, 5, 25, 61, 109, 131, 305, 545, 655, 1525, 2725, 3275, 6649, 7991, 14279, 33245, 39955, 71395, 166225, 199775, 356975, 871019, 4355095, 21775475]

約数ペア:

[(1, 21775475), (5, 4355095), (25, 871019), (61, 356975), (109, 199775), (131, 166225), (305, 71395), (545, 39955), (655, 33245), (1525, 14279), (2725, 7991), (3275, 6649)]