21330428

素因数分解:

$2^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{241}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 44721600

約数和(自身を除く): 23391172

約数列:

[1, 2, 4, 7, 14, 28, 29, 58, 109, 116, 203, 218, 241, 406, 436, 482, 763, 812, 964, 1526, 1687, 3052, 3161, 3374, 6322, 6748, 6989, 12644, 13978, 22127, 26269, 27956, 44254, 48923, 52538, 88508, 97846, 105076, 183883, 195692, 367766, 735532, 761801, 1523602, 3047204, 5332607, 10665214, 21330428]

約数ペア:

[(1, 21330428), (2, 10665214), (4, 5332607), (7, 3047204), (14, 1523602), (28, 761801), (29, 735532), (58, 367766), (109, 195692), (116, 183883), (203, 105076), (218, 97846), (241, 88508), (406, 52538), (436, 48923), (482, 44254), (763, 27956), (812, 26269), (964, 22127), (1526, 13978), (1687, 12644), (3052, 6989), (3161, 6748), (3374, 6322)]