21493550

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{769}}^1$

素因数の和:837

約数の個数: 48

約数和(自身を含む): 44111760

約数和(自身を除く): 22618210

約数列:

[1, 2, 5, 10, 13, 25, 26, 43, 50, 65, 86, 130, 215, 325, 430, 559, 650, 769, 1075, 1118, 1538, 2150, 2795, 3845, 5590, 7690, 9997, 13975, 19225, 19994, 27950, 33067, 38450, 49985, 66134, 99970, 165335, 249925, 330670, 429871, 499850, 826675, 859742, 1653350, 2149355, 4298710, 10746775, 21493550]

約数ペア:

[(1, 21493550), (2, 10746775), (5, 4298710), (10, 2149355), (13, 1653350), (25, 859742), (26, 826675), (43, 499850), (50, 429871), (65, 330670), (86, 249925), (130, 165335), (215, 99970), (325, 66134), (430, 49985), (559, 38450), (650, 33067), (769, 27950), (1075, 19994), (1118, 19225), (1538, 13975), (2150, 9997), (2795, 7690), (3845, 5590)]