20644640

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6791}}^1$

素因数の和:6825

約数の個数: 48

約数和(自身を含む): 51347520

約数和(自身を除く): 30702880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6791, 13582, 27164, 33955, 54328, 67910, 108656, 129029, 135820, 217312, 258058, 271640, 516116, 543280, 645145, 1032232, 1086560, 1290290, 2064464, 2580580, 4128928, 5161160, 10322320, 20644640]

約数ペア:

[(1, 20644640), (2, 10322320), (4, 5161160), (5, 4128928), (8, 2580580), (10, 2064464), (16, 1290290), (19, 1086560), (20, 1032232), (32, 645145), (38, 543280), (40, 516116), (76, 271640), (80, 258058), (95, 217312), (152, 135820), (160, 129029), (190, 108656), (304, 67910), (380, 54328), (608, 33955), (760, 27164), (1520, 13582), (3040, 6791)]