18720705

素因数分解:

$3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{379}}^1$

素因数の和:513

約数の個数: 32

約数和(自身を含む): 31190400

約数和(自身を除く): 12469695

約数列:

[1, 3, 5, 15, 37, 89, 111, 185, 267, 379, 445, 555, 1137, 1335, 1895, 3293, 5685, 9879, 14023, 16465, 33731, 42069, 49395, 70115, 101193, 168655, 210345, 505965, 1248047, 3744141, 6240235, 18720705]

約数ペア:

[(1, 18720705), (3, 6240235), (5, 3744141), (15, 1248047), (37, 505965), (89, 210345), (111, 168655), (185, 101193), (267, 70115), (379, 49395), (445, 42069), (555, 33731), (1137, 16465), (1335, 14023), (1895, 9879), (3293, 5685)]