20712447

素因数分解:

$3^2\times 7^2\times {\mathrm{67}}^1\times {\mathrm{701}}^1$

素因数の和:788

約数の個数: 36

約数和(自身を含む): 35372376

約数和(自身を除く): 14659929

約数列:

[1, 3, 7, 9, 21, 49, 63, 67, 147, 201, 441, 469, 603, 701, 1407, 2103, 3283, 4221, 4907, 6309, 9849, 14721, 29547, 34349, 44163, 46967, 103047, 140901, 309141, 328769, 422703, 986307, 2301383, 2958921, 6904149, 20712447]

約数ペア:

[(1, 20712447), (3, 6904149), (7, 2958921), (9, 2301383), (21, 986307), (49, 422703), (63, 328769), (67, 309141), (147, 140901), (201, 103047), (441, 46967), (469, 44163), (603, 34349), (701, 29547), (1407, 14721), (2103, 9849), (3283, 6309), (4221, 4907)]