20917840

素因数分解:

$2^4\times 5^1\times {\mathrm{373}}^1\times {\mathrm{701}}^1$

素因数の和:1087

約数の個数: 40

約数和(自身を含む): 48833928

約数和(自身を除く): 27916088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 373, 701, 746, 1402, 1492, 1865, 2804, 2984, 3505, 3730, 5608, 5968, 7010, 7460, 11216, 14020, 14920, 28040, 29840, 56080, 261473, 522946, 1045892, 1307365, 2091784, 2614730, 4183568, 5229460, 10458920, 20917840]

約数ペア:

[(1, 20917840), (2, 10458920), (4, 5229460), (5, 4183568), (8, 2614730), (10, 2091784), (16, 1307365), (20, 1045892), (40, 522946), (80, 261473), (373, 56080), (701, 29840), (746, 28040), (1402, 14920), (1492, 14020), (1865, 11216), (2804, 7460), (2984, 7010), (3505, 5968), (3730, 5608)]