21197918590

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{490579}}^1$

素因数の和:490764

約数の個数: 32

約数和(自身を含む): 39736980000

約数和(自身を除く): 18539061410

約数列:

[1, 2, 5, 10, 29, 58, 145, 149, 290, 298, 745, 1490, 4321, 8642, 21605, 43210, 490579, 981158, 2452895, 4905790, 14226791, 28453582, 71133955, 73096271, 142267910, 146192542, 365481355, 730962710, 2119791859, 4239583718, 10598959295, 21197918590]

約数ペア:

[(1, 21197918590), (2, 10598959295), (5, 4239583718), (10, 2119791859), (29, 730962710), (58, 365481355), (145, 146192542), (149, 142267910), (290, 73096271), (298, 71133955), (745, 28453582), (1490, 14226791), (4321, 4905790), (8642, 2452895), (21605, 981158), (43210, 490579)]