21312555

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{3491}}^1$

素因数の和:3547

約数の個数: 32

約数和(自身を含む): 38216448

約数和(自身を除く): 16903893

約数列:

[1, 3, 5, 11, 15, 33, 37, 55, 111, 165, 185, 407, 555, 1221, 2035, 3491, 6105, 10473, 17455, 38401, 52365, 115203, 129167, 192005, 387501, 576015, 645835, 1420837, 1937505, 4262511, 7104185, 21312555]

約数ペア:

[(1, 21312555), (3, 7104185), (5, 4262511), (11, 1937505), (15, 1420837), (33, 645835), (37, 576015), (55, 387501), (111, 192005), (165, 129167), (185, 115203), (407, 52365), (555, 38401), (1221, 17455), (2035, 10473), (3491, 6105)]