20697615

素因数分解:

$3^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 38128896

約数和(自身を除く): 17431281

約数列:

[1, 3, 5, 9, 15, 31, 37, 45, 93, 111, 155, 185, 279, 333, 401, 465, 555, 1147, 1203, 1395, 1665, 2005, 3441, 3609, 5735, 6015, 10323, 12431, 14837, 17205, 18045, 37293, 44511, 51615, 62155, 74185, 111879, 133533, 186465, 222555, 459947, 559395, 667665, 1379841, 2299735, 4139523, 6899205, 20697615]

約数ペア:

[(1, 20697615), (3, 6899205), (5, 4139523), (9, 2299735), (15, 1379841), (31, 667665), (37, 559395), (45, 459947), (93, 222555), (111, 186465), (155, 133533), (185, 111879), (279, 74185), (333, 62155), (401, 51615), (465, 44511), (555, 37293), (1147, 18045), (1203, 17205), (1395, 14837), (1665, 12431), (2005, 10323), (3441, 6015), (3609, 5735)]