840508420

素因数分解:

$2^2\times 5^1\times {\mathrm{541}}^1\times {\mathrm{77681}}^1$

素因数の和:78231

約数の個数: 24

約数和(自身を含む): 1768353048

約数和(自身を除く): 927844628

約数列:

[1, 2, 4, 5, 10, 20, 541, 1082, 2164, 2705, 5410, 10820, 77681, 155362, 310724, 388405, 776810, 1553620, 42025421, 84050842, 168101684, 210127105, 420254210, 840508420]

約数ペア:

[(1, 840508420), (2, 420254210), (4, 210127105), (5, 168101684), (10, 84050842), (20, 42025421), (541, 1553620), (1082, 776810), (2164, 388405), (2705, 310724), (5410, 155362), (10820, 77681)]