21820490

素因数分解:

$2^1\times 5^1\times {\mathrm{173}}^1\times {\mathrm{12613}}^1$

素因数の和:12793

約数の個数: 16

約数和(自身を含む): 39507048

約数和(自身を除く): 17686558

約数列:

[1, 2, 5, 10, 173, 346, 865, 1730, 12613, 25226, 63065, 126130, 2182049, 4364098, 10910245, 21820490]

約数ペア:

[(1, 21820490), (2, 10910245), (5, 4364098), (10, 2182049), (173, 126130), (346, 63065), (865, 25226), (1730, 12613)]