20819788

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{7757}}^1$

素因数の和:7833

約数の個数: 24

約数和(自身を含む): 40403664

約数和(自身を除く): 19583876

約数列:

[1, 2, 4, 11, 22, 44, 61, 122, 244, 671, 1342, 2684, 7757, 15514, 31028, 85327, 170654, 341308, 473177, 946354, 1892708, 5204947, 10409894, 20819788]

約数ペア:

[(1, 20819788), (2, 10409894), (4, 5204947), (11, 1892708), (22, 946354), (44, 473177), (61, 341308), (122, 170654), (244, 85327), (671, 31028), (1342, 15514), (2684, 7757)]