21541780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2857}}^1$

素因数の和:2908

約数の個数: 48

約数和(自身を含む): 50415120

約数和(自身を除く): 28873340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 260, 290, 377, 580, 754, 1508, 1885, 2857, 3770, 5714, 7540, 11428, 14285, 28570, 37141, 57140, 74282, 82853, 148564, 165706, 185705, 331412, 371410, 414265, 742820, 828530, 1077089, 1657060, 2154178, 4308356, 5385445, 10770890, 21541780]

約数ペア:

[(1, 21541780), (2, 10770890), (4, 5385445), (5, 4308356), (10, 2154178), (13, 1657060), (20, 1077089), (26, 828530), (29, 742820), (52, 414265), (58, 371410), (65, 331412), (116, 185705), (130, 165706), (145, 148564), (260, 82853), (290, 74282), (377, 57140), (580, 37141), (754, 28570), (1508, 14285), (1885, 11428), (2857, 7540), (3770, 5714)]