20447665

素因数分解:

$5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 29154816

約数和(自身を除く): 8707151

約数列:

[1, 5, 7, 35, 53, 73, 151, 265, 365, 371, 511, 755, 1057, 1855, 2555, 3869, 5285, 8003, 11023, 19345, 27083, 40015, 55115, 56021, 77161, 135415, 280105, 385805, 584219, 2921095, 4089533, 20447665]

約数ペア:

[(1, 20447665), (5, 4089533), (7, 2921095), (35, 584219), (53, 385805), (73, 280105), (151, 135415), (265, 77161), (365, 56021), (371, 55115), (511, 40015), (755, 27083), (1057, 19345), (1855, 11023), (2555, 8003), (3869, 5285)]