21621340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{607}}^1$

素因数の和:766

約数の個数: 48

約数和(自身を含む): 49335552

約数和(自身を除く): 27714212

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 137, 260, 274, 548, 607, 685, 1214, 1370, 1781, 2428, 2740, 3035, 3562, 6070, 7124, 7891, 8905, 12140, 15782, 17810, 31564, 35620, 39455, 78910, 83159, 157820, 166318, 332636, 415795, 831590, 1081067, 1663180, 2162134, 4324268, 5405335, 10810670, 21621340]

約数ペア:

[(1, 21621340), (2, 10810670), (4, 5405335), (5, 4324268), (10, 2162134), (13, 1663180), (20, 1081067), (26, 831590), (52, 415795), (65, 332636), (130, 166318), (137, 157820), (260, 83159), (274, 78910), (548, 39455), (607, 35620), (685, 31564), (1214, 17810), (1370, 15782), (1781, 12140), (2428, 8905), (2740, 7891), (3035, 7124), (3562, 6070)]