21458763

素因数分解:

$3^4\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:217

約数の個数: 40

約数和(自身を含む): 33668976

約数和(自身を除く): 12210213

約数列:

[1, 3, 9, 27, 43, 61, 81, 101, 129, 183, 303, 387, 549, 909, 1161, 1647, 2623, 2727, 3483, 4343, 4941, 6161, 7869, 8181, 13029, 18483, 23607, 39087, 55449, 70821, 117261, 166347, 212463, 264923, 351783, 499041, 794769, 2384307, 7152921, 21458763]

約数ペア:

[(1, 21458763), (3, 7152921), (9, 2384307), (27, 794769), (43, 499041), (61, 351783), (81, 264923), (101, 212463), (129, 166347), (183, 117261), (303, 70821), (387, 55449), (549, 39087), (909, 23607), (1161, 18483), (1647, 13029), (2623, 8181), (2727, 7869), (3483, 6161), (4343, 4941)]