20720778

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{631}}^1$

素因数の和:1070

約数の個数: 32

約数和(自身を含む): 44806272

約数和(自身を除く): 24085494

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 421, 631, 842, 1262, 1263, 1893, 2526, 3786, 5473, 8203, 10946, 16406, 16419, 24609, 32838, 49218, 265651, 531302, 796953, 1593906, 3453463, 6906926, 10360389, 20720778]

約数ペア:

[(1, 20720778), (2, 10360389), (3, 6906926), (6, 3453463), (13, 1593906), (26, 796953), (39, 531302), (78, 265651), (421, 49218), (631, 32838), (842, 24609), (1262, 16419), (1263, 16406), (1893, 10946), (2526, 8203), (3786, 5473)]