21202425

素因数分解:

$3^3\times 5^2\times {\mathrm{101}}^1\times {\mathrm{311}}^1$

素因数の和:431

約数の個数: 48

約数和(自身を含む): 39461760

約数和(自身を除く): 18259335

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 101, 135, 225, 303, 311, 505, 675, 909, 933, 1515, 1555, 2525, 2727, 2799, 4545, 4665, 7575, 7775, 8397, 13635, 13995, 22725, 23325, 31411, 41985, 68175, 69975, 94233, 157055, 209925, 282699, 471165, 785275, 848097, 1413495, 2355825, 4240485, 7067475, 21202425]

約数ペア:

[(1, 21202425), (3, 7067475), (5, 4240485), (9, 2355825), (15, 1413495), (25, 848097), (27, 785275), (45, 471165), (75, 282699), (101, 209925), (135, 157055), (225, 94233), (303, 69975), (311, 68175), (505, 41985), (675, 31411), (909, 23325), (933, 22725), (1515, 13995), (1555, 13635), (2525, 8397), (2727, 7775), (2799, 7575), (4545, 4665)]