20978153

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{1019}}^1$

素因数の和:1216

約数の個数: 16

約数和(自身を含む): 25557120

約数和(自身を除く): 4578967

約数列:

[1, 7, 17, 119, 173, 1019, 1211, 2941, 7133, 17323, 20587, 121261, 176287, 1234009, 2996879, 20978153]

約数ペア:

[(1, 20978153), (7, 2996879), (17, 1234009), (119, 176287), (173, 121261), (1019, 20587), (1211, 17323), (2941, 7133)]