20557215

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9323}}^1$

素因数の和:9348

約数の個数: 36

約数和(自身を含む): 41454504

約数和(自身を除く): 20897289

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9323, 27969, 46615, 65261, 83907, 139845, 195783, 326305, 419535, 456827, 587349, 978915, 1370481, 2284135, 2936745, 4111443, 6852405, 20557215]

約数ペア:

[(1, 20557215), (3, 6852405), (5, 4111443), (7, 2936745), (9, 2284135), (15, 1370481), (21, 978915), (35, 587349), (45, 456827), (49, 419535), (63, 326305), (105, 195783), (147, 139845), (245, 83907), (315, 65261), (441, 46615), (735, 27969), (2205, 9323)]