21995145

素因数分解:

$3^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{421}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 40552512

約数和(自身を除く): 18557367

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 129, 135, 215, 243, 387, 405, 421, 645, 1161, 1215, 1263, 1935, 2105, 3483, 3789, 5805, 6315, 10449, 11367, 17415, 18103, 18945, 34101, 52245, 54309, 56835, 90515, 102303, 162927, 170505, 271545, 488781, 511515, 814635, 1466343, 2443905, 4399029, 7331715, 21995145]

約数ペア:

[(1, 21995145), (3, 7331715), (5, 4399029), (9, 2443905), (15, 1466343), (27, 814635), (43, 511515), (45, 488781), (81, 271545), (129, 170505), (135, 162927), (215, 102303), (243, 90515), (387, 56835), (405, 54309), (421, 52245), (645, 34101), (1161, 18945), (1215, 18103), (1263, 17415), (1935, 11367), (2105, 10449), (3483, 6315), (3789, 5805)]