20674420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{607}}^1$

素因数の和:760

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 26516108

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 131, 260, 262, 524, 607, 655, 1214, 1310, 1703, 2428, 2620, 3035, 3406, 6070, 6812, 7891, 8515, 12140, 15782, 17030, 31564, 34060, 39455, 78910, 79517, 157820, 159034, 318068, 397585, 795170, 1033721, 1590340, 2067442, 4134884, 5168605, 10337210, 20674420]

約数ペア:

[(1, 20674420), (2, 10337210), (4, 5168605), (5, 4134884), (10, 2067442), (13, 1590340), (20, 1033721), (26, 795170), (52, 397585), (65, 318068), (130, 159034), (131, 157820), (260, 79517), (262, 78910), (524, 39455), (607, 34060), (655, 31564), (1214, 17030), (1310, 15782), (1703, 12140), (2428, 8515), (2620, 7891), (3035, 6812), (3406, 6070)]