20490815

素因数分解:

$5^1\times {\mathrm{23}}^2\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:239

約数の個数: 24

約数和(自身を含む): 26331648

約数和(自身を除く): 5840833

約数列:

[1, 5, 23, 61, 115, 127, 305, 529, 635, 1403, 2645, 2921, 7015, 7747, 14605, 32269, 38735, 67183, 161345, 178181, 335915, 890905, 4098163, 20490815]

約数ペア:

[(1, 20490815), (5, 4098163), (23, 890905), (61, 335915), (115, 178181), (127, 161345), (305, 67183), (529, 38735), (635, 32269), (1403, 14605), (2645, 7747), (2921, 7015)]