21109465

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^2$

素因数の和:237

約数の個数: 24

約数和(自身を含む): 28262808

約数和(自身を除く): 7153343

約数列:

[1, 5, 13, 41, 65, 89, 205, 445, 533, 1157, 2665, 3649, 5785, 7921, 18245, 39605, 47437, 102973, 237185, 324761, 514865, 1623805, 4221893, 21109465]

約数ペア:

[(1, 21109465), (5, 4221893), (13, 1623805), (41, 514865), (65, 324761), (89, 237185), (205, 102973), (445, 47437), (533, 39605), (1157, 18245), (2665, 7921), (3649, 5785)]