20828745

素因数分解:

$3^5\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:137

約数の個数: 96

約数和(自身を含む): 44728320

約数和(自身を除く): 23899575

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 31, 35, 45, 63, 79, 81, 93, 105, 135, 155, 189, 217, 237, 243, 279, 315, 395, 405, 465, 553, 567, 651, 711, 837, 945, 1085, 1185, 1215, 1395, 1659, 1701, 1953, 2133, 2449, 2511, 2765, 2835, 3255, 3555, 4185, 4977, 5859, 6399, 7347, 7533, 8295, 8505, 9765, 10665, 12245, 12555, 14931, 17143, 17577, 19197, 22041, 24885, 29295, 31995, 36735, 37665, 44793, 51429, 52731, 66123, 74655, 85715, 87885, 95985, 110205, 134379, 154287, 198369, 223965, 257145, 263655, 330615, 462861, 595107, 671895, 771435, 991845, 1388583, 2314305, 2975535, 4165749, 6942915, 20828745]

約数ペア:

[(1, 20828745), (3, 6942915), (5, 4165749), (7, 2975535), (9, 2314305), (15, 1388583), (21, 991845), (27, 771435), (31, 671895), (35, 595107), (45, 462861), (63, 330615), (79, 263655), (81, 257145), (93, 223965), (105, 198369), (135, 154287), (155, 134379), (189, 110205), (217, 95985), (237, 87885), (243, 85715), (279, 74655), (315, 66123), (395, 52731), (405, 51429), (465, 44793), (553, 37665), (567, 36735), (651, 31995), (711, 29295), (837, 24885), (945, 22041), (1085, 19197), (1185, 17577), (1215, 17143), (1395, 14931), (1659, 12555), (1701, 12245), (1953, 10665), (2133, 9765), (2449, 8505), (2511, 8295), (2765, 7533), (2835, 7347), (3255, 6399), (3555, 5859), (4185, 4977)]