21906920

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{11177}}^1$

素因数の和:11202

約数の個数: 48

約数和(自身を含む): 57343140

約数和(自身を除く): 35436220

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 11177, 22354, 44708, 55885, 78239, 89416, 111770, 156478, 223540, 312956, 391195, 447080, 547673, 625912, 782390, 1095346, 1564780, 2190692, 2738365, 3129560, 4381384, 5476730, 10953460, 21906920]

約数ペア:

[(1, 21906920), (2, 10953460), (4, 5476730), (5, 4381384), (7, 3129560), (8, 2738365), (10, 2190692), (14, 1564780), (20, 1095346), (28, 782390), (35, 625912), (40, 547673), (49, 447080), (56, 391195), (70, 312956), (98, 223540), (140, 156478), (196, 111770), (245, 89416), (280, 78239), (392, 55885), (490, 44708), (980, 22354), (1960, 11177)]