21440140

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{127}}^1\times {\mathrm{367}}^1$

素因数の和:526

約数の個数: 48

約数和(自身を含む): 47480832

約数和(自身を除く): 26040692

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 127, 230, 254, 367, 460, 508, 635, 734, 1270, 1468, 1835, 2540, 2921, 3670, 5842, 7340, 8441, 11684, 14605, 16882, 29210, 33764, 42205, 46609, 58420, 84410, 93218, 168820, 186436, 233045, 466090, 932180, 1072007, 2144014, 4288028, 5360035, 10720070, 21440140]

約数ペア:

[(1, 21440140), (2, 10720070), (4, 5360035), (5, 4288028), (10, 2144014), (20, 1072007), (23, 932180), (46, 466090), (92, 233045), (115, 186436), (127, 168820), (230, 93218), (254, 84410), (367, 58420), (460, 46609), (508, 42205), (635, 33764), (734, 29210), (1270, 16882), (1468, 14605), (1835, 11684), (2540, 8441), (2921, 7340), (3670, 5842)]