21188180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{227}}^1\times {\mathrm{359}}^1$

素因数の和:608

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 27074860

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 227, 260, 359, 454, 718, 908, 1135, 1436, 1795, 2270, 2951, 3590, 4540, 4667, 5902, 7180, 9334, 11804, 14755, 18668, 23335, 29510, 46670, 59020, 81493, 93340, 162986, 325972, 407465, 814930, 1059409, 1629860, 2118818, 4237636, 5297045, 10594090, 21188180]

約数ペア:

[(1, 21188180), (2, 10594090), (4, 5297045), (5, 4237636), (10, 2118818), (13, 1629860), (20, 1059409), (26, 814930), (52, 407465), (65, 325972), (130, 162986), (227, 93340), (260, 81493), (359, 59020), (454, 46670), (718, 29510), (908, 23335), (1135, 18668), (1436, 14755), (1795, 11804), (2270, 9334), (2951, 7180), (3590, 5902), (4540, 4667)]