21080178

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{293}}^1\times {\mathrm{571}}^1$

素因数の和:879

約数の個数: 48

約数和(自身を含む): 52468416

約数和(自身を除く): 31388238

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126, 293, 571, 586, 879, 1142, 1713, 1758, 2051, 2637, 3426, 3997, 4102, 5139, 5274, 6153, 7994, 10278, 11991, 12306, 18459, 23982, 35973, 36918, 71946, 167303, 334606, 501909, 1003818, 1171121, 1505727, 2342242, 3011454, 3513363, 7026726, 10540089, 21080178]

約数ペア:

[(1, 21080178), (2, 10540089), (3, 7026726), (6, 3513363), (7, 3011454), (9, 2342242), (14, 1505727), (18, 1171121), (21, 1003818), (42, 501909), (63, 334606), (126, 167303), (293, 71946), (571, 36918), (586, 35973), (879, 23982), (1142, 18459), (1713, 12306), (1758, 11991), (2051, 10278), (2637, 7994), (3426, 6153), (3997, 5274), (4102, 5139)]