21706905

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{293}}^1\times {\mathrm{449}}^1$

素因数の和:761

約数の個数: 32

約数和(自身を含む): 38102400

約数和(自身を除く): 16395495

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 293, 449, 879, 1347, 1465, 2245, 3223, 4395, 4939, 6735, 9669, 14817, 16115, 24695, 48345, 74085, 131557, 394671, 657785, 1447127, 1973355, 4341381, 7235635, 21706905]

約数ペア:

[(1, 21706905), (3, 7235635), (5, 4341381), (11, 1973355), (15, 1447127), (33, 657785), (55, 394671), (165, 131557), (293, 74085), (449, 48345), (879, 24695), (1347, 16115), (1465, 14817), (2245, 9669), (3223, 6735), (4395, 4939)]