257440640

素因数分解:

$2^7\times 5^1\times {\mathrm{41}}^1\times {\mathrm{9811}}^1$

素因数の和:9871

約数の個数: 64

約数和(自身を含む): 630519120

約数和(自身を除く): 373078480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 320, 328, 410, 640, 656, 820, 1312, 1640, 2624, 3280, 5248, 6560, 9811, 13120, 19622, 26240, 39244, 49055, 78488, 98110, 156976, 196220, 313952, 392440, 402251, 627904, 784880, 804502, 1255808, 1569760, 1609004, 2011255, 3139520, 3218008, 4022510, 6279040, 6436016, 8045020, 12872032, 16090040, 25744064, 32180080, 51488128, 64360160, 128720320, 257440640]

約数ペア:

[(1, 257440640), (2, 128720320), (4, 64360160), (5, 51488128), (8, 32180080), (10, 25744064), (16, 16090040), (20, 12872032), (32, 8045020), (40, 6436016), (41, 6279040), (64, 4022510), (80, 3218008), (82, 3139520), (128, 2011255), (160, 1609004), (164, 1569760), (205, 1255808), (320, 804502), (328, 784880), (410, 627904), (640, 402251), (656, 392440), (820, 313952), (1312, 196220), (1640, 156976), (2624, 98110), (3280, 78488), (5248, 49055), (6560, 39244), (9811, 26240), (13120, 19622)]