20972679

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4519}}^1$

素因数の和:4559

約数の個数: 32

約数和(自身を含む): 36449280

約数和(自身を除く): 15476601

約数列:

[1, 3, 7, 13, 17, 21, 39, 51, 91, 119, 221, 273, 357, 663, 1547, 4519, 4641, 13557, 31633, 58747, 76823, 94899, 176241, 230469, 411229, 537761, 998699, 1233687, 1613283, 2996097, 6990893, 20972679]

約数ペア:

[(1, 20972679), (3, 6990893), (7, 2996097), (13, 1613283), (17, 1233687), (21, 998699), (39, 537761), (51, 411229), (91, 230469), (119, 176241), (221, 94899), (273, 76823), (357, 58747), (663, 31633), (1547, 13557), (4519, 4641)]