21127821

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2897}}^1$

素因数の和:2941

約数の個数: 32

約数和(自身を含む): 35054208

約数和(自身を除く): 13926387

約数列:

[1, 3, 11, 13, 17, 33, 39, 51, 143, 187, 221, 429, 561, 663, 2431, 2897, 7293, 8691, 31867, 37661, 49249, 95601, 112983, 147747, 414271, 541739, 640237, 1242813, 1625217, 1920711, 7042607, 21127821]

約数ペア:

[(1, 21127821), (3, 7042607), (11, 1920711), (13, 1625217), (17, 1242813), (33, 640237), (39, 541739), (51, 414271), (143, 147747), (187, 112983), (221, 95601), (429, 49249), (561, 37661), (663, 31867), (2431, 8691), (2897, 7293)]