20887760

素因数分解:

$2^4\times 5^1\times {\mathrm{191}}^1\times {\mathrm{1367}}^1$

素因数の和:1571

約数の個数: 40

約数和(自身を含む): 48854016

約数和(自身を除く): 27966256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 191, 382, 764, 955, 1367, 1528, 1910, 2734, 3056, 3820, 5468, 6835, 7640, 10936, 13670, 15280, 21872, 27340, 54680, 109360, 261097, 522194, 1044388, 1305485, 2088776, 2610970, 4177552, 5221940, 10443880, 20887760]

約数ペア:

[(1, 20887760), (2, 10443880), (4, 5221940), (5, 4177552), (8, 2610970), (10, 2088776), (16, 1305485), (20, 1044388), (40, 522194), (80, 261097), (191, 109360), (382, 54680), (764, 27340), (955, 21872), (1367, 15280), (1528, 13670), (1910, 10936), (2734, 7640), (3056, 6835), (3820, 5468)]