644959160

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{204101}}^1$

素因数の和:204191

約数の個数: 32

約数和(自身を含む): 1469534400

約数和(自身を除く): 824575240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 204101, 408202, 816404, 1020505, 1632808, 2041010, 4082020, 8164040, 16123979, 32247958, 64495916, 80619895, 128991832, 161239790, 322479580, 644959160]

約数ペア:

[(1, 644959160), (2, 322479580), (4, 161239790), (5, 128991832), (8, 80619895), (10, 64495916), (20, 32247958), (40, 16123979), (79, 8164040), (158, 4082020), (316, 2041010), (395, 1632808), (632, 1020505), (790, 816404), (1580, 408202), (3160, 204101)]