20798320

素因数分解:

$2^4\times 5^1\times {\mathrm{499}}^1\times {\mathrm{521}}^1$

素因数の和:1033

約数の個数: 40

約数和(自身を含む): 48546000

約数和(自身を除く): 27747680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499, 521, 998, 1042, 1996, 2084, 2495, 2605, 3992, 4168, 4990, 5210, 7984, 8336, 9980, 10420, 19960, 20840, 39920, 41680, 259979, 519958, 1039916, 1299895, 2079832, 2599790, 4159664, 5199580, 10399160, 20798320]

約数ペア:

[(1, 20798320), (2, 10399160), (4, 5199580), (5, 4159664), (8, 2599790), (10, 2079832), (16, 1299895), (20, 1039916), (40, 519958), (80, 259979), (499, 41680), (521, 39920), (998, 20840), (1042, 19960), (1996, 10420), (2084, 9980), (2495, 8336), (2605, 7984), (3992, 5210), (4168, 4990)]