640371340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{147551}}^1$

素因数の和:147598

約数の個数: 48

約数和(自身を含む): 1586479104

約数和(自身を除く): 946107764

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, 147551, 295102, 590204, 737755, 1032857, 1475510, 2065714, 2951020, 4131428, 4574081, 5164285, 9148162, 10328570, 18296324, 20657140, 22870405, 32018567, 45740810, 64037134, 91481620, 128074268, 160092835, 320185670, 640371340]

約数ペア:

[(1, 640371340), (2, 320185670), (4, 160092835), (5, 128074268), (7, 91481620), (10, 64037134), (14, 45740810), (20, 32018567), (28, 22870405), (31, 20657140), (35, 18296324), (62, 10328570), (70, 9148162), (124, 5164285), (140, 4574081), (155, 4131428), (217, 2951020), (310, 2065714), (434, 1475510), (620, 1032857), (868, 737755), (1085, 590204), (2170, 295102), (4340, 147551)]