19917900

素因数分解:

$2^2\times 3^4\times 5^2\times {\mathrm{2459}}^1$

素因数の和:2485

約数の個数: 90

約数和(自身を含む): 64592220

約数和(自身を除く): 44674320

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 27, 30, 36, 45, 50, 54, 60, 75, 81, 90, 100, 108, 135, 150, 162, 180, 225, 270, 300, 324, 405, 450, 540, 675, 810, 900, 1350, 1620, 2025, 2459, 2700, 4050, 4918, 7377, 8100, 9836, 12295, 14754, 22131, 24590, 29508, 36885, 44262, 49180, 61475, 66393, 73770, 88524, 110655, 122950, 132786, 147540, 184425, 199179, 221310, 245900, 265572, 331965, 368850, 398358, 442620, 553275, 663930, 737700, 796716, 995895, 1106550, 1327860, 1659825, 1991790, 2213100, 3319650, 3983580, 4979475, 6639300, 9958950, 19917900]

約数ペア:

[(1, 19917900), (2, 9958950), (3, 6639300), (4, 4979475), (5, 3983580), (6, 3319650), (9, 2213100), (10, 1991790), (12, 1659825), (15, 1327860), (18, 1106550), (20, 995895), (25, 796716), (27, 737700), (30, 663930), (36, 553275), (45, 442620), (50, 398358), (54, 368850), (60, 331965), (75, 265572), (81, 245900), (90, 221310), (100, 199179), (108, 184425), (135, 147540), (150, 132786), (162, 122950), (180, 110655), (225, 88524), (270, 73770), (300, 66393), (324, 61475), (405, 49180), (450, 44262), (540, 36885), (675, 29508), (810, 24590), (900, 22131), (1350, 14754), (1620, 12295), (2025, 9836), (2459, 8100), (2700, 7377), (4050, 4918)]