18920080

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{3331}}^1$

素因数の和:3415

約数の個数: 40

約数和(自身を含む): 44622144

約数和(自身を除く): 25702064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 284, 355, 568, 710, 1136, 1420, 2840, 3331, 5680, 6662, 13324, 16655, 26648, 33310, 53296, 66620, 133240, 236501, 266480, 473002, 946004, 1182505, 1892008, 2365010, 3784016, 4730020, 9460040, 18920080]

約数ペア:

[(1, 18920080), (2, 9460040), (4, 4730020), (5, 3784016), (8, 2365010), (10, 1892008), (16, 1182505), (20, 946004), (40, 473002), (71, 266480), (80, 236501), (142, 133240), (284, 66620), (355, 53296), (568, 33310), (710, 26648), (1136, 16655), (1420, 13324), (2840, 6662), (3331, 5680)]