21538616

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{311}}^1\times {\mathrm{787}}^1$

素因数の和:1115

約数の個数: 32

約数和(自身を含む): 44254080

約数和(自身を除く): 22715464

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 311, 622, 787, 1244, 1574, 2488, 3148, 3421, 6296, 6842, 8657, 13684, 17314, 27368, 34628, 69256, 244757, 489514, 979028, 1958056, 2692327, 5384654, 10769308, 21538616]

約数ペア:

[(1, 21538616), (2, 10769308), (4, 5384654), (8, 2692327), (11, 1958056), (22, 979028), (44, 489514), (88, 244757), (311, 69256), (622, 34628), (787, 27368), (1244, 17314), (1574, 13684), (2488, 8657), (3148, 6842), (3421, 6296)]