19905345

素因数分解:

$3^6\times 5^1\times {\mathrm{43}}^1\times {\mathrm{127}}^1$

素因数の和:193

約数の個数: 56

約数和(自身を含む): 36934656

約数和(自身を除く): 17029311

約数列:

[1, 3, 5, 9, 15, 27, 43, 45, 81, 127, 129, 135, 215, 243, 381, 387, 405, 635, 645, 729, 1143, 1161, 1215, 1905, 1935, 3429, 3483, 3645, 5461, 5715, 5805, 10287, 10449, 16383, 17145, 17415, 27305, 30861, 31347, 49149, 51435, 52245, 81915, 92583, 147447, 154305, 156735, 245745, 442341, 462915, 737235, 1327023, 2211705, 3981069, 6635115, 19905345]

約数ペア:

[(1, 19905345), (3, 6635115), (5, 3981069), (9, 2211705), (15, 1327023), (27, 737235), (43, 462915), (45, 442341), (81, 245745), (127, 156735), (129, 154305), (135, 147447), (215, 92583), (243, 81915), (381, 52245), (387, 51435), (405, 49149), (635, 31347), (645, 30861), (729, 27305), (1143, 17415), (1161, 17145), (1215, 16383), (1905, 10449), (1935, 10287), (3429, 5805), (3483, 5715), (3645, 5461)]