20515149

素因数分解:

$3^2\times {\mathrm{23}}^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:222

約数の個数: 36

約数和(自身を含む): 32206720

約数和(自身を除く): 11691571

約数列:

[1, 3, 9, 23, 31, 69, 93, 139, 207, 279, 417, 529, 713, 1251, 1587, 2139, 3197, 4309, 4761, 6417, 9591, 12927, 16399, 28773, 38781, 49197, 73531, 99107, 147591, 220593, 297321, 661779, 891963, 2279461, 6838383, 20515149]

約数ペア:

[(1, 20515149), (3, 6838383), (9, 2279461), (23, 891963), (31, 661779), (69, 297321), (93, 220593), (139, 147591), (207, 99107), (279, 73531), (417, 49197), (529, 38781), (713, 28773), (1251, 16399), (1587, 12927), (2139, 9591), (3197, 6417), (4309, 4761)]