20689890

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53051}}^1$

素因数の和:53074

約数の個数: 32

約数和(自身を含む): 53476416

約数和(自身を除く): 32786526

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 53051, 106102, 159153, 265255, 318306, 530510, 689663, 795765, 1379326, 1591530, 2068989, 3448315, 4137978, 6896630, 10344945, 20689890]

約数ペア:

[(1, 20689890), (2, 10344945), (3, 6896630), (5, 4137978), (6, 3448315), (10, 2068989), (13, 1591530), (15, 1379326), (26, 795765), (30, 689663), (39, 530510), (65, 318306), (78, 265255), (130, 159153), (195, 106102), (390, 53051)]