20805057

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1$

素因数の和:243

約数の個数: 72

約数和(自身を含む): 39836160

約数和(自身を除く): 19031103

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 49, 57, 63, 91, 117, 133, 147, 171, 191, 247, 273, 399, 441, 573, 637, 741, 819, 931, 1197, 1337, 1719, 1729, 1911, 2223, 2483, 2793, 3629, 4011, 5187, 5733, 7449, 8379, 9359, 10887, 12033, 12103, 15561, 17381, 22347, 25403, 28077, 32661, 36309, 47177, 52143, 76209, 84231, 108927, 121667, 141531, 156429, 177821, 228627, 330239, 365001, 424593, 533463, 990717, 1095003, 1600389, 2311673, 2972151, 6935019, 20805057]

約数ペア:

[(1, 20805057), (3, 6935019), (7, 2972151), (9, 2311673), (13, 1600389), (19, 1095003), (21, 990717), (39, 533463), (49, 424593), (57, 365001), (63, 330239), (91, 228627), (117, 177821), (133, 156429), (147, 141531), (171, 121667), (191, 108927), (247, 84231), (273, 76209), (399, 52143), (441, 47177), (573, 36309), (637, 32661), (741, 28077), (819, 25403), (931, 22347), (1197, 17381), (1337, 15561), (1719, 12103), (1729, 12033), (1911, 10887), (2223, 9359), (2483, 8379), (2793, 7449), (3629, 5733), (4011, 5187)]