20831715

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{313}}^1$

素因数の和:373

約数の個数: 64

約数和(自身を含む): 40694400

約数和(自身を除く): 19862685

約数列:

[1, 3, 5, 9, 15, 17, 27, 29, 45, 51, 85, 87, 135, 145, 153, 255, 261, 313, 435, 459, 493, 765, 783, 939, 1305, 1479, 1565, 2295, 2465, 2817, 3915, 4437, 4695, 5321, 7395, 8451, 9077, 13311, 14085, 15963, 22185, 26605, 27231, 42255, 45385, 47889, 66555, 79815, 81693, 136155, 143667, 154309, 239445, 245079, 408465, 462927, 718335, 771545, 1225395, 1388781, 2314635, 4166343, 6943905, 20831715]

約数ペア:

[(1, 20831715), (3, 6943905), (5, 4166343), (9, 2314635), (15, 1388781), (17, 1225395), (27, 771545), (29, 718335), (45, 462927), (51, 408465), (85, 245079), (87, 239445), (135, 154309), (145, 143667), (153, 136155), (255, 81693), (261, 79815), (313, 66555), (435, 47889), (459, 45385), (493, 42255), (765, 27231), (783, 26605), (939, 22185), (1305, 15963), (1479, 14085), (1565, 13311), (2295, 9077), (2465, 8451), (2817, 7395), (3915, 5321), (4437, 4695)]