21198728

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:266

約数の個数: 48

約数和(自身を含む): 43268580

約数和(自身を除く): 22069852

約数列:

[1, 2, 4, 8, 17, 34, 53, 68, 106, 136, 173, 212, 289, 346, 424, 578, 692, 901, 1156, 1384, 1802, 2312, 2941, 3604, 5882, 7208, 9169, 11764, 15317, 18338, 23528, 30634, 36676, 49997, 61268, 73352, 99994, 122536, 155873, 199988, 311746, 399976, 623492, 1246984, 2649841, 5299682, 10599364, 21198728]

約数ペア:

[(1, 21198728), (2, 10599364), (4, 5299682), (8, 2649841), (17, 1246984), (34, 623492), (53, 399976), (68, 311746), (106, 199988), (136, 155873), (173, 122536), (212, 99994), (289, 73352), (346, 61268), (424, 49997), (578, 36676), (692, 30634), (901, 23528), (1156, 18338), (1384, 15317), (1802, 11764), (2312, 9169), (2941, 7208), (3604, 5882)]