20213380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{661}}^1$

素因数の和:820

約数の個数: 48

約数和(自身を含む): 46710720

約数和(自身を除く): 26497340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 661, 695, 1322, 1390, 1529, 2644, 2780, 3058, 3305, 6116, 6610, 7271, 7645, 13220, 14542, 15290, 29084, 30580, 36355, 72710, 91879, 145420, 183758, 367516, 459395, 918790, 1010669, 1837580, 2021338, 4042676, 5053345, 10106690, 20213380]

約数ペア:

[(1, 20213380), (2, 10106690), (4, 5053345), (5, 4042676), (10, 2021338), (11, 1837580), (20, 1010669), (22, 918790), (44, 459395), (55, 367516), (110, 183758), (139, 145420), (220, 91879), (278, 72710), (556, 36355), (661, 30580), (695, 29084), (1322, 15290), (1390, 14542), (1529, 13220), (2644, 7645), (2780, 7271), (3058, 6610), (3305, 6116)]