21393315

素因数分解:

$3^4\times 5^1\times {\mathrm{101}}^1\times {\mathrm{523}}^1$

素因数の和:641

約数の個数: 40

約数和(自身を含む): 38803248

約数和(自身を除く): 17409933

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 101, 135, 303, 405, 505, 523, 909, 1515, 1569, 2615, 2727, 4545, 4707, 7845, 8181, 13635, 14121, 23535, 40905, 42363, 52823, 70605, 158469, 211815, 264115, 475407, 792345, 1426221, 2377035, 4278663, 7131105, 21393315]

約数ペア:

[(1, 21393315), (3, 7131105), (5, 4278663), (9, 2377035), (15, 1426221), (27, 792345), (45, 475407), (81, 264115), (101, 211815), (135, 158469), (303, 70605), (405, 52823), (505, 42363), (523, 40905), (909, 23535), (1515, 14121), (1569, 13635), (2615, 8181), (2727, 7845), (4545, 4707)]