20211380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4657}}^1$

素因数の和:4704

約数の個数: 48

約数和(自身を含む): 50082816

約数和(自身を除く): 29871436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4657, 9314, 18628, 23285, 32599, 46570, 65198, 93140, 130396, 144367, 162995, 288734, 325990, 577468, 651980, 721835, 1010569, 1443670, 2021138, 2887340, 4042276, 5052845, 10105690, 20211380]

約数ペア:

[(1, 20211380), (2, 10105690), (4, 5052845), (5, 4042276), (7, 2887340), (10, 2021138), (14, 1443670), (20, 1010569), (28, 721835), (31, 651980), (35, 577468), (62, 325990), (70, 288734), (124, 162995), (140, 144367), (155, 130396), (217, 93140), (310, 65198), (434, 46570), (620, 32599), (868, 23285), (1085, 18628), (2170, 9314), (4340, 4657)]