21966725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{151}}^1$

素因数の和:218

約数の個数: 36

約数和(自身を含む): 31268832

約数和(自身を除く): 9302107

約数列:

[1, 5, 11, 23, 25, 55, 115, 151, 253, 275, 529, 575, 755, 1265, 1661, 2645, 3473, 3775, 5819, 6325, 8305, 13225, 17365, 29095, 38203, 41525, 79879, 86825, 145475, 191015, 399395, 878669, 955075, 1996975, 4393345, 21966725]

約数ペア:

[(1, 21966725), (5, 4393345), (11, 1996975), (23, 955075), (25, 878669), (55, 399395), (115, 191015), (151, 145475), (253, 86825), (275, 79879), (529, 41525), (575, 38203), (755, 29095), (1265, 17365), (1661, 13225), (2645, 8305), (3473, 6325), (3775, 5819)]