21212960

素因数分解:

$2^5\times 5^1\times {\mathrm{197}}^1\times {\mathrm{673}}^1$

素因数の和:885

約数の個数: 48

約数和(自身を含む): 50444856

約数和(自身を除く): 29231896

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 197, 394, 673, 788, 985, 1346, 1576, 1970, 2692, 3152, 3365, 3940, 5384, 6304, 6730, 7880, 10768, 13460, 15760, 21536, 26920, 31520, 53840, 107680, 132581, 265162, 530324, 662905, 1060648, 1325810, 2121296, 2651620, 4242592, 5303240, 10606480, 21212960]

約数ペア:

[(1, 21212960), (2, 10606480), (4, 5303240), (5, 4242592), (8, 2651620), (10, 2121296), (16, 1325810), (20, 1060648), (32, 662905), (40, 530324), (80, 265162), (160, 132581), (197, 107680), (394, 53840), (673, 31520), (788, 26920), (985, 21536), (1346, 15760), (1576, 13460), (1970, 10768), (2692, 7880), (3152, 6730), (3365, 6304), (3940, 5384)]