20664380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8539}}^1$

素因数の和:8570

約数の個数: 36

約数和(自身を含む): 47704440

約数和(自身を除く): 27040060

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8539, 17078, 34156, 42695, 85390, 93929, 170780, 187858, 375716, 469645, 939290, 1033219, 1878580, 2066438, 4132876, 5166095, 10332190, 20664380]

約数ペア:

[(1, 20664380), (2, 10332190), (4, 5166095), (5, 4132876), (10, 2066438), (11, 1878580), (20, 1033219), (22, 939290), (44, 469645), (55, 375716), (110, 187858), (121, 170780), (220, 93929), (242, 85390), (484, 42695), (605, 34156), (1210, 17078), (2420, 8539)]