21705705

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1$

素因数の和:347

約数の個数: 64

約数和(自身を含む): 44728320

約数和(自身を除く): 23022615

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 103, 105, 135, 189, 223, 309, 315, 515, 669, 721, 927, 945, 1115, 1545, 1561, 2007, 2163, 2781, 3345, 3605, 4635, 4683, 6021, 6489, 7805, 10035, 10815, 13905, 14049, 19467, 22969, 23415, 30105, 32445, 42147, 68907, 70245, 97335, 114845, 160783, 206721, 210735, 344535, 482349, 620163, 803915, 1033605, 1447047, 2411745, 3100815, 4341141, 7235235, 21705705]

約数ペア:

[(1, 21705705), (3, 7235235), (5, 4341141), (7, 3100815), (9, 2411745), (15, 1447047), (21, 1033605), (27, 803915), (35, 620163), (45, 482349), (63, 344535), (103, 210735), (105, 206721), (135, 160783), (189, 114845), (223, 97335), (309, 70245), (315, 68907), (515, 42147), (669, 32445), (721, 30105), (927, 23415), (945, 22969), (1115, 19467), (1545, 14049), (1561, 13905), (2007, 10815), (2163, 10035), (2781, 7805), (3345, 6489), (3605, 6021), (4635, 4683)]