21739905

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{1187}}^1$

素因数の和:1246

約数の個数: 48

約数和(自身を含む): 42254784

約数和(自身を除く): 20514879

約数列:

[1, 3, 5, 9, 11, 15, 33, 37, 45, 55, 99, 111, 165, 185, 333, 407, 495, 555, 1187, 1221, 1665, 2035, 3561, 3663, 5935, 6105, 10683, 13057, 17805, 18315, 39171, 43919, 53415, 65285, 117513, 131757, 195855, 219595, 395271, 483109, 587565, 658785, 1449327, 1976355, 2415545, 4347981, 7246635, 21739905]

約数ペア:

[(1, 21739905), (3, 7246635), (5, 4347981), (9, 2415545), (11, 1976355), (15, 1449327), (33, 658785), (37, 587565), (45, 483109), (55, 395271), (99, 219595), (111, 195855), (165, 131757), (185, 117513), (333, 65285), (407, 53415), (495, 43919), (555, 39171), (1187, 18315), (1221, 17805), (1665, 13057), (2035, 10683), (3561, 6105), (3663, 5935)]