640876688

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{829}}^1\times {\mathrm{2543}}^1$

素因数の和:3399

約数の個数: 40

約数和(自身を含む): 1309142400

約数和(自身を除く): 668265712

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 829, 1658, 2543, 3316, 5086, 6632, 10172, 13264, 15751, 20344, 31502, 40688, 48317, 63004, 96634, 126008, 193268, 252016, 386536, 773072, 2108147, 4216294, 8432588, 16865176, 33730352, 40054793, 80109586, 160219172, 320438344, 640876688]

約数ペア:

[(1, 640876688), (2, 320438344), (4, 160219172), (8, 80109586), (16, 40054793), (19, 33730352), (38, 16865176), (76, 8432588), (152, 4216294), (304, 2108147), (829, 773072), (1658, 386536), (2543, 252016), (3316, 193268), (5086, 126008), (6632, 96634), (10172, 63004), (13264, 48317), (15751, 40688), (20344, 31502)]