21000332180

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1033}}^1\times {\mathrm{1997}}^1$

素因数の和:3548

約数の個数: 48

約数和(自身を含む): 44252263440

約数和(自身を除く): 23251931260

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1033, 1997, 2036, 2066, 2545, 3994, 4132, 5090, 5165, 7988, 9985, 10180, 10330, 19970, 20660, 39940, 525797, 1016473, 1051594, 2032946, 2062901, 2103188, 2628985, 4065892, 4125802, 5082365, 5257970, 8251604, 10164730, 10314505, 10515940, 20329460, 20629010, 41258020, 1050016609, 2100033218, 4200066436, 5250083045, 10500166090, 21000332180]

約数ペア:

[(1, 21000332180), (2, 10500166090), (4, 5250083045), (5, 4200066436), (10, 2100033218), (20, 1050016609), (509, 41258020), (1018, 20629010), (1033, 20329460), (1997, 10515940), (2036, 10314505), (2066, 10164730), (2545, 8251604), (3994, 5257970), (4132, 5082365), (5090, 4125802), (5165, 4065892), (7988, 2628985), (9985, 2103188), (10180, 2062901), (10330, 2032946), (19970, 1051594), (20660, 1016473), (39940, 525797)]