20751561

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{101}}^1\times {\mathrm{617}}^1$

素因数の和:761

約数の個数: 24

約数和(自身を含む): 31139784

約数和(自身を除く): 10388223

約数列:

[1, 3, 9, 37, 101, 111, 303, 333, 617, 909, 1851, 3737, 5553, 11211, 22829, 33633, 62317, 68487, 186951, 205461, 560853, 2305729, 6917187, 20751561]

約数ペア:

[(1, 20751561), (3, 6917187), (9, 2305729), (37, 560853), (101, 205461), (111, 186951), (303, 68487), (333, 62317), (617, 33633), (909, 22829), (1851, 11211), (3737, 5553)]