20002040020

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12659519}}^1$

素因数の和:12659607

約数の個数: 24

約数和(自身を含む): 42535987200

約数和(自身を除く): 22533947180

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12659519, 25319038, 50638076, 63297595, 126595190, 253190380, 1000102001, 2000204002, 4000408004, 5000510005, 10001020010, 20002040020]

約数ペア:

[(1, 20002040020), (2, 10001020010), (4, 5000510005), (5, 4000408004), (10, 2000204002), (20, 1000102001), (79, 253190380), (158, 126595190), (316, 63297595), (395, 50638076), (790, 25319038), (1580, 12659519)]