640900365

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{313}}^1\times {\mathrm{19501}}^1$

素因数の和:19829

約数の個数: 32

約数和(自身を含む): 1175736576

約数和(自身を除く): 534836211

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 313, 939, 1565, 2191, 4695, 6573, 10955, 19501, 32865, 58503, 97505, 136507, 292515, 409521, 682535, 2047605, 6103813, 18311439, 30519065, 42726691, 91557195, 128180073, 213633455, 640900365]

約数ペア:

[(1, 640900365), (3, 213633455), (5, 128180073), (7, 91557195), (15, 42726691), (21, 30519065), (35, 18311439), (105, 6103813), (313, 2047605), (939, 682535), (1565, 409521), (2191, 292515), (4695, 136507), (6573, 97505), (10955, 58503), (19501, 32865)]