20572839

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{337}}^1$

素因数の和:389

約数の個数: 64

約数和(自身を含む): 38937600

約数和(自身を除く): 18364761

約数列:

[1, 3, 7, 9, 17, 19, 21, 27, 51, 57, 63, 119, 133, 153, 171, 189, 323, 337, 357, 399, 459, 513, 969, 1011, 1071, 1197, 2261, 2359, 2907, 3033, 3213, 3591, 5729, 6403, 6783, 7077, 8721, 9099, 17187, 19209, 20349, 21231, 40103, 44821, 51561, 57627, 61047, 63693, 108851, 120309, 134463, 154683, 172881, 326553, 360927, 403389, 761957, 979659, 1082781, 1210167, 2285871, 2938977, 6857613, 20572839]

約数ペア:

[(1, 20572839), (3, 6857613), (7, 2938977), (9, 2285871), (17, 1210167), (19, 1082781), (21, 979659), (27, 761957), (51, 403389), (57, 360927), (63, 326553), (119, 172881), (133, 154683), (153, 134463), (171, 120309), (189, 108851), (323, 63693), (337, 61047), (357, 57627), (399, 51561), (459, 44821), (513, 40103), (969, 21231), (1011, 20349), (1071, 19209), (1197, 17187), (2261, 9099), (2359, 8721), (2907, 7077), (3033, 6783), (3213, 6403), (3591, 5729)]