21209625

素因数分解:

$3^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{1109}}^1$

素因数の和:1147

約数の個数: 48

約数和(自身を含む): 40519440

約数和(自身を除く): 19309815

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 75, 85, 125, 153, 225, 255, 375, 425, 765, 1109, 1125, 1275, 2125, 3327, 3825, 5545, 6375, 9981, 16635, 18853, 19125, 27725, 49905, 56559, 83175, 94265, 138625, 169677, 249525, 282795, 415875, 471325, 848385, 1247625, 1413975, 2356625, 4241925, 7069875, 21209625]

約数ペア:

[(1, 21209625), (3, 7069875), (5, 4241925), (9, 2356625), (15, 1413975), (17, 1247625), (25, 848385), (45, 471325), (51, 415875), (75, 282795), (85, 249525), (125, 169677), (153, 138625), (225, 94265), (255, 83175), (375, 56559), (425, 49905), (765, 27725), (1109, 19125), (1125, 18853), (1275, 16635), (2125, 9981), (3327, 6375), (3825, 5545)]