20921115

素因数分解:

$3^1\times 5^1\times {\mathrm{911}}^1\times {\mathrm{1531}}^1$

素因数の和:2450

約数の個数: 16

約数和(自身を含む): 33532416

約数和(自身を除く): 12611301

約数列:

[1, 3, 5, 15, 911, 1531, 2733, 4555, 4593, 7655, 13665, 22965, 1394741, 4184223, 6973705, 20921115]

約数ペア:

[(1, 20921115), (3, 6973705), (5, 4184223), (15, 1394741), (911, 22965), (1531, 13665), (2733, 7655), (4555, 4593)]