221604920

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{39857}}^1$

素因数の和:40007

約数の個数: 32

約数和(自身を含む): 502210800

約数和(自身を除く): 280605880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 139, 278, 556, 695, 1112, 1390, 2780, 5560, 39857, 79714, 159428, 199285, 318856, 398570, 797140, 1594280, 5540123, 11080246, 22160492, 27700615, 44320984, 55401230, 110802460, 221604920]

約数ペア:

[(1, 221604920), (2, 110802460), (4, 55401230), (5, 44320984), (8, 27700615), (10, 22160492), (20, 11080246), (40, 5540123), (139, 1594280), (278, 797140), (556, 398570), (695, 318856), (1112, 199285), (1390, 159428), (2780, 79714), (5560, 39857)]