640955348

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{769}}^1\times {\mathrm{997}}^1$

素因数の和:1800

約数の個数: 48

約数和(自身を含む): 1291012800

約数和(自身を除く): 650057452

約数列:

[1, 2, 4, 11, 19, 22, 38, 44, 76, 209, 418, 769, 836, 997, 1538, 1994, 3076, 3988, 8459, 10967, 14611, 16918, 18943, 21934, 29222, 33836, 37886, 43868, 58444, 75772, 160721, 208373, 321442, 416746, 642884, 766693, 833492, 1533386, 3066772, 8433623, 14567167, 16867246, 29134334, 33734492, 58268668, 160238837, 320477674, 640955348]

約数ペア:

[(1, 640955348), (2, 320477674), (4, 160238837), (11, 58268668), (19, 33734492), (22, 29134334), (38, 16867246), (44, 14567167), (76, 8433623), (209, 3066772), (418, 1533386), (769, 833492), (836, 766693), (997, 642884), (1538, 416746), (1994, 321442), (3076, 208373), (3988, 160721), (8459, 75772), (10967, 58444), (14611, 43868), (16918, 37886), (18943, 33836), (21934, 29222)]