21206284

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{7901}}^1$

素因数の和:7977

約数の個数: 24

約数和(自身を含む): 41153616

約数和(自身を除く): 19947332

約数列:

[1, 2, 4, 11, 22, 44, 61, 122, 244, 671, 1342, 2684, 7901, 15802, 31604, 86911, 173822, 347644, 481961, 963922, 1927844, 5301571, 10603142, 21206284]

約数ペア:

[(1, 21206284), (2, 10603142), (4, 5301571), (11, 1927844), (22, 963922), (44, 481961), (61, 347644), (122, 173822), (244, 86911), (671, 31604), (1342, 15802), (2684, 7901)]