17938820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1$

素因数の和:392

約数の個数: 48

約数和(自身を含む): 39417840

約数和(自身を除く): 21479020

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 157, 197, 290, 314, 394, 580, 628, 785, 788, 985, 1570, 1970, 3140, 3940, 4553, 5713, 9106, 11426, 18212, 22765, 22852, 28565, 30929, 45530, 57130, 61858, 91060, 114260, 123716, 154645, 309290, 618580, 896941, 1793882, 3587764, 4484705, 8969410, 17938820]

約数ペア:

[(1, 17938820), (2, 8969410), (4, 4484705), (5, 3587764), (10, 1793882), (20, 896941), (29, 618580), (58, 309290), (116, 154645), (145, 123716), (157, 114260), (197, 91060), (290, 61858), (314, 57130), (394, 45530), (580, 30929), (628, 28565), (785, 22852), (788, 22765), (985, 18212), (1570, 11426), (1970, 9106), (3140, 5713), (3940, 4553)]