640967907

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{251}}^1\times {\mathrm{631}}^1$

素因数の和:975

約数の個数: 32

約数和(自身を含む): 917360640

約数和(自身を除く): 276392733

約数列:

[1, 3, 19, 57, 71, 213, 251, 631, 753, 1349, 1893, 4047, 4769, 11989, 14307, 17821, 35967, 44801, 53463, 134403, 158381, 338599, 475143, 851219, 1015797, 2553657, 3009239, 9027717, 11245051, 33735153, 213655969, 640967907]

約数ペア:

[(1, 640967907), (3, 213655969), (19, 33735153), (57, 11245051), (71, 9027717), (213, 3009239), (251, 2553657), (631, 1015797), (753, 851219), (1349, 475143), (1893, 338599), (4047, 158381), (4769, 134403), (11989, 53463), (14307, 44801), (17821, 35967)]