15997821

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 25555200

約数和(自身を除く): 9557379

約数列:

[1, 3, 7, 21, 29, 87, 109, 203, 241, 327, 609, 723, 763, 1687, 2289, 3161, 5061, 6989, 9483, 20967, 22127, 26269, 48923, 66381, 78807, 146769, 183883, 551649, 761801, 2285403, 5332607, 15997821]

約数ペア:

[(1, 15997821), (3, 5332607), (7, 2285403), (21, 761801), (29, 551649), (87, 183883), (109, 146769), (203, 78807), (241, 66381), (327, 48923), (609, 26269), (723, 22127), (763, 20967), (1687, 9483), (2289, 6989), (3161, 5061)]