21500775

素因数分解:

$3^3\times 5^2\times {\mathrm{53}}^1\times {\mathrm{601}}^1$

素因数の和:673

約数の個数: 48

約数和(自身を含む): 40309920

約数和(自身を除く): 18809145

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 53, 75, 135, 159, 225, 265, 477, 601, 675, 795, 1325, 1431, 1803, 2385, 3005, 3975, 5409, 7155, 9015, 11925, 15025, 16227, 27045, 31853, 35775, 45075, 81135, 95559, 135225, 159265, 286677, 405675, 477795, 796325, 860031, 1433385, 2388975, 4300155, 7166925, 21500775]

約数ペア:

[(1, 21500775), (3, 7166925), (5, 4300155), (9, 2388975), (15, 1433385), (25, 860031), (27, 796325), (45, 477795), (53, 405675), (75, 286677), (135, 159265), (159, 135225), (225, 95559), (265, 81135), (477, 45075), (601, 35775), (675, 31853), (795, 27045), (1325, 16227), (1431, 15025), (1803, 11925), (2385, 9015), (3005, 7155), (3975, 5409)]