21371710

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{971}}^1$

素因数の和:1080

約数の個数: 32

約数和(自身を含む): 40310784

約数和(自身を除く): 18939074

約数列:

[1, 2, 5, 10, 31, 62, 71, 142, 155, 310, 355, 710, 971, 1942, 2201, 4402, 4855, 9710, 11005, 22010, 30101, 60202, 68941, 137882, 150505, 301010, 344705, 689410, 2137171, 4274342, 10685855, 21371710]

約数ペア:

[(1, 21371710), (2, 10685855), (5, 4274342), (10, 2137171), (31, 689410), (62, 344705), (71, 301010), (142, 150505), (155, 137882), (310, 68941), (355, 60202), (710, 30101), (971, 22010), (1942, 11005), (2201, 9710), (4402, 4855)]