20802925

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{23}}^2$

素因数の和:91

約数の個数: 54

約数和(自身を含む): 31920266

約数和(自身を除く): 11117341

約数列:

[1, 5, 11, 13, 23, 25, 55, 65, 115, 121, 143, 253, 275, 299, 325, 529, 575, 605, 715, 1265, 1495, 1573, 2645, 2783, 3025, 3289, 3575, 5819, 6325, 6877, 7475, 7865, 13225, 13915, 16445, 29095, 34385, 36179, 39325, 64009, 69575, 75647, 82225, 145475, 171925, 180895, 320045, 378235, 832117, 904475, 1600225, 1891175, 4160585, 20802925]

約数ペア:

[(1, 20802925), (5, 4160585), (11, 1891175), (13, 1600225), (23, 904475), (25, 832117), (55, 378235), (65, 320045), (115, 180895), (121, 171925), (143, 145475), (253, 82225), (275, 75647), (299, 69575), (325, 64009), (529, 39325), (575, 36179), (605, 34385), (715, 29095), (1265, 16445), (1495, 13915), (1573, 13225), (2645, 7865), (2783, 7475), (3025, 6877), (3289, 6325), (3575, 5819)]