21520538

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1\times {\mathrm{269}}^1$

素因数の和:482

約数の個数: 32

約数和(自身を含む): 37149840

約数和(自身を除く): 15629302

約数列:

[1, 2, 13, 17, 26, 34, 181, 221, 269, 362, 442, 538, 2353, 3077, 3497, 4573, 4706, 6154, 6994, 9146, 40001, 48689, 59449, 80002, 97378, 118898, 632957, 827713, 1265914, 1655426, 10760269, 21520538]

約数ペア:

[(1, 21520538), (2, 10760269), (13, 1655426), (17, 1265914), (26, 827713), (34, 632957), (181, 118898), (221, 97378), (269, 80002), (362, 59449), (442, 48689), (538, 40001), (2353, 9146), (3077, 6994), (3497, 6154), (4573, 4706)]