1820147480

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1\times {\mathrm{1487}}^1$

素因数の和:2000

約数の個数: 64

約数和(自身を含む): 4165447680

約数和(自身を除く): 2345300200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 431, 568, 710, 862, 1420, 1487, 1724, 2155, 2840, 2974, 3448, 4310, 5948, 7435, 8620, 11896, 14870, 17240, 29740, 30601, 59480, 61202, 105577, 122404, 153005, 211154, 244808, 306010, 422308, 527885, 612020, 640897, 844616, 1055770, 1224040, 1281794, 2111540, 2563588, 3204485, 4223080, 5127176, 6408970, 12817940, 25635880, 45503687, 91007374, 182014748, 227518435, 364029496, 455036870, 910073740, 1820147480]

約数ペア:

[(1, 1820147480), (2, 910073740), (4, 455036870), (5, 364029496), (8, 227518435), (10, 182014748), (20, 91007374), (40, 45503687), (71, 25635880), (142, 12817940), (284, 6408970), (355, 5127176), (431, 4223080), (568, 3204485), (710, 2563588), (862, 2111540), (1420, 1281794), (1487, 1224040), (1724, 1055770), (2155, 844616), (2840, 640897), (2974, 612020), (3448, 527885), (4310, 422308), (5948, 306010), (7435, 244808), (8620, 211154), (11896, 153005), (14870, 122404), (17240, 105577), (29740, 61202), (30601, 59480)]