21991920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{2131}}^1$

素因数の和:2190

約数の個数: 80

約数和(自身を含む): 69793152

約数和(自身を除く): 47801232

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 43, 48, 60, 80, 86, 120, 129, 172, 215, 240, 258, 344, 430, 516, 645, 688, 860, 1032, 1290, 1720, 2064, 2131, 2580, 3440, 4262, 5160, 6393, 8524, 10320, 10655, 12786, 17048, 21310, 25572, 31965, 34096, 42620, 51144, 63930, 85240, 91633, 102288, 127860, 170480, 183266, 255720, 274899, 366532, 458165, 511440, 549798, 733064, 916330, 1099596, 1374495, 1466128, 1832660, 2199192, 2748990, 3665320, 4398384, 5497980, 7330640, 10995960, 21991920]

約数ペア:

[(1, 21991920), (2, 10995960), (3, 7330640), (4, 5497980), (5, 4398384), (6, 3665320), (8, 2748990), (10, 2199192), (12, 1832660), (15, 1466128), (16, 1374495), (20, 1099596), (24, 916330), (30, 733064), (40, 549798), (43, 511440), (48, 458165), (60, 366532), (80, 274899), (86, 255720), (120, 183266), (129, 170480), (172, 127860), (215, 102288), (240, 91633), (258, 85240), (344, 63930), (430, 51144), (516, 42620), (645, 34096), (688, 31965), (860, 25572), (1032, 21310), (1290, 17048), (1720, 12786), (2064, 10655), (2131, 10320), (2580, 8524), (3440, 6393), (4262, 5160)]