78108280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{97}}^1\times {\mathrm{491}}^1$

素因数の和:640

約数の個数: 64

約数和(自身を含む): 182256480

約数和(自身を除く): 104148200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 97, 164, 194, 205, 328, 388, 410, 485, 491, 776, 820, 970, 982, 1640, 1940, 1964, 2455, 3880, 3928, 3977, 4910, 7954, 9820, 15908, 19640, 19885, 20131, 31816, 39770, 40262, 47627, 79540, 80524, 95254, 100655, 159080, 161048, 190508, 201310, 238135, 381016, 402620, 476270, 805240, 952540, 1905080, 1952707, 3905414, 7810828, 9763535, 15621656, 19527070, 39054140, 78108280]

約数ペア:

[(1, 78108280), (2, 39054140), (4, 19527070), (5, 15621656), (8, 9763535), (10, 7810828), (20, 3905414), (40, 1952707), (41, 1905080), (82, 952540), (97, 805240), (164, 476270), (194, 402620), (205, 381016), (328, 238135), (388, 201310), (410, 190508), (485, 161048), (491, 159080), (776, 100655), (820, 95254), (970, 80524), (982, 79540), (1640, 47627), (1940, 40262), (1964, 39770), (2455, 31816), (3880, 20131), (3928, 19885), (3977, 19640), (4910, 15908), (7954, 9820)]