21542620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{541}}^1$

素因数の和:742

約数の個数: 48

約数和(自身を含む): 49716576

約数和(自身を除く): 28173956

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 181, 220, 362, 541, 724, 905, 1082, 1810, 1991, 2164, 2705, 3620, 3982, 5410, 5951, 7964, 9955, 10820, 11902, 19910, 23804, 29755, 39820, 59510, 97921, 119020, 195842, 391684, 489605, 979210, 1077131, 1958420, 2154262, 4308524, 5385655, 10771310, 21542620]

約数ペア:

[(1, 21542620), (2, 10771310), (4, 5385655), (5, 4308524), (10, 2154262), (11, 1958420), (20, 1077131), (22, 979210), (44, 489605), (55, 391684), (110, 195842), (181, 119020), (220, 97921), (362, 59510), (541, 39820), (724, 29755), (905, 23804), (1082, 19910), (1810, 11902), (1991, 10820), (2164, 9955), (2705, 7964), (3620, 5951), (3982, 5410)]