21791825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{727}}^1$

素因数の和:857

約数の個数: 24

約数和(自身を含む): 29789760

約数和(自身を除く): 7997935

約数列:

[1, 5, 11, 25, 55, 109, 275, 545, 727, 1199, 2725, 3635, 5995, 7997, 18175, 29975, 39985, 79243, 199925, 396215, 871673, 1981075, 4358365, 21791825]

約数ペア:

[(1, 21791825), (5, 4358365), (11, 1981075), (25, 871673), (55, 396215), (109, 199925), (275, 79243), (545, 39985), (727, 29975), (1199, 18175), (2725, 7997), (3635, 5995)]