21492848

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{541}}^1$

素因数の和:753

約数の個数: 40

約数和(自身を含む): 45163776

約数和(自身を除く): 23670928

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 191, 208, 382, 541, 764, 1082, 1528, 2164, 2483, 3056, 4328, 4966, 7033, 8656, 9932, 14066, 19864, 28132, 39728, 56264, 103331, 112528, 206662, 413324, 826648, 1343303, 1653296, 2686606, 5373212, 10746424, 21492848]

約数ペア:

[(1, 21492848), (2, 10746424), (4, 5373212), (8, 2686606), (13, 1653296), (16, 1343303), (26, 826648), (52, 413324), (104, 206662), (191, 112528), (208, 103331), (382, 56264), (541, 39728), (764, 28132), (1082, 19864), (1528, 14066), (2164, 9932), (2483, 8656), (3056, 7033), (4328, 4966)]