641779480

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{122477}}^1$

素因数の和:122619

約数の個数: 32

約数和(自身を含む): 1455038640

約数和(自身を除く): 813259160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 122477, 244954, 489908, 612385, 979816, 1224770, 2449540, 4899080, 16044487, 32088974, 64177948, 80222435, 128355896, 160444870, 320889740, 641779480]

約数ペア:

[(1, 641779480), (2, 320889740), (4, 160444870), (5, 128355896), (8, 80222435), (10, 64177948), (20, 32088974), (40, 16044487), (131, 4899080), (262, 2449540), (524, 1224770), (655, 979816), (1048, 612385), (1310, 489908), (2620, 244954), (5240, 122477)]