20397156

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{2467}}^1$

素因数の和:2540

約数の個数: 48

約数和(自身を含む): 52242624

約数和(自身を除く): 31845468

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 53, 78, 106, 156, 159, 212, 318, 636, 689, 1378, 2067, 2467, 2756, 4134, 4934, 7401, 8268, 9868, 14802, 29604, 32071, 64142, 96213, 128284, 130751, 192426, 261502, 384852, 392253, 523004, 784506, 1569012, 1699763, 3399526, 5099289, 6799052, 10198578, 20397156]

約数ペア:

[(1, 20397156), (2, 10198578), (3, 6799052), (4, 5099289), (6, 3399526), (12, 1699763), (13, 1569012), (26, 784506), (39, 523004), (52, 392253), (53, 384852), (78, 261502), (106, 192426), (156, 130751), (159, 128284), (212, 96213), (318, 64142), (636, 32071), (689, 29604), (1378, 14802), (2067, 9868), (2467, 8268), (2756, 7401), (4134, 4934)]