21687705

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{283}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 40936896

約数和(自身を除く): 19249191

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 131, 195, 283, 393, 585, 655, 849, 1179, 1415, 1703, 1965, 2547, 3679, 4245, 5109, 5895, 8515, 11037, 12735, 15327, 18395, 25545, 33111, 37073, 55185, 76635, 111219, 165555, 185365, 333657, 481949, 556095, 1445847, 1668285, 2409745, 4337541, 7229235, 21687705]

約数ペア:

[(1, 21687705), (3, 7229235), (5, 4337541), (9, 2409745), (13, 1668285), (15, 1445847), (39, 556095), (45, 481949), (65, 333657), (117, 185365), (131, 165555), (195, 111219), (283, 76635), (393, 55185), (585, 37073), (655, 33111), (849, 25545), (1179, 18395), (1415, 15327), (1703, 12735), (1965, 11037), (2547, 8515), (3679, 5895), (4245, 5109)]