781569020

素因数分解:

$2^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{173}}^1\times {\mathrm{1999}}^1$

素因数の和:2294

約数の個数: 48

約数和(自身を含む): 1666224000

約数和(自身を除く): 884654980

約数列:

[1, 2, 4, 5, 10, 20, 113, 173, 226, 346, 452, 565, 692, 865, 1130, 1730, 1999, 2260, 3460, 3998, 7996, 9995, 19549, 19990, 39098, 39980, 78196, 97745, 195490, 225887, 345827, 390980, 451774, 691654, 903548, 1129435, 1383308, 1729135, 2258870, 3458270, 4517740, 6916540, 39078451, 78156902, 156313804, 195392255, 390784510, 781569020]

約数ペア:

[(1, 781569020), (2, 390784510), (4, 195392255), (5, 156313804), (10, 78156902), (20, 39078451), (113, 6916540), (173, 4517740), (226, 3458270), (346, 2258870), (452, 1729135), (565, 1383308), (692, 1129435), (865, 903548), (1130, 691654), (1730, 451774), (1999, 390980), (2260, 345827), (3460, 225887), (3998, 195490), (7996, 97745), (9995, 78196), (19549, 39980), (19990, 39098)]