21248955

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5189}}^1$

素因数の和:5220

約数の個数: 48

約数和(自身を含む): 45339840

約数和(自身を除く): 24090885

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 35, 39, 45, 63, 65, 91, 105, 117, 195, 273, 315, 455, 585, 819, 1365, 4095, 5189, 15567, 25945, 36323, 46701, 67457, 77835, 108969, 181615, 202371, 233505, 326907, 337285, 472199, 544845, 607113, 1011855, 1416597, 1634535, 2360995, 3035565, 4249791, 7082985, 21248955]

約数ペア:

[(1, 21248955), (3, 7082985), (5, 4249791), (7, 3035565), (9, 2360995), (13, 1634535), (15, 1416597), (21, 1011855), (35, 607113), (39, 544845), (45, 472199), (63, 337285), (65, 326907), (91, 233505), (105, 202371), (117, 181615), (195, 108969), (273, 77835), (315, 67457), (455, 46701), (585, 36323), (819, 25945), (1365, 15567), (4095, 5189)]