20195955

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:145

約数の個数: 96

約数和(自身を含む): 41932800

約数和(自身を除く): 21736845

約数列:

[1, 3, 5, 9, 13, 15, 19, 23, 39, 45, 57, 65, 69, 79, 95, 115, 117, 171, 195, 207, 237, 247, 285, 299, 345, 395, 437, 585, 711, 741, 855, 897, 1027, 1035, 1185, 1235, 1311, 1495, 1501, 1817, 2185, 2223, 2691, 3081, 3555, 3705, 3933, 4485, 4503, 5135, 5451, 5681, 6555, 7505, 9085, 9243, 11115, 13455, 13509, 15405, 16353, 17043, 19513, 19665, 22515, 23621, 27255, 28405, 34523, 46215, 51129, 58539, 67545, 70863, 81765, 85215, 97565, 103569, 118105, 172615, 175617, 212589, 255645, 292695, 310707, 354315, 448799, 517845, 878085, 1062945, 1346397, 1553535, 2243995, 4039191, 6731985, 20195955]

約数ペア:

[(1, 20195955), (3, 6731985), (5, 4039191), (9, 2243995), (13, 1553535), (15, 1346397), (19, 1062945), (23, 878085), (39, 517845), (45, 448799), (57, 354315), (65, 310707), (69, 292695), (79, 255645), (95, 212589), (115, 175617), (117, 172615), (171, 118105), (195, 103569), (207, 97565), (237, 85215), (247, 81765), (285, 70863), (299, 67545), (345, 58539), (395, 51129), (437, 46215), (585, 34523), (711, 28405), (741, 27255), (855, 23621), (897, 22515), (1027, 19665), (1035, 19513), (1185, 17043), (1235, 16353), (1311, 15405), (1495, 13509), (1501, 13455), (1817, 11115), (2185, 9243), (2223, 9085), (2691, 7505), (3081, 6555), (3555, 5681), (3705, 5451), (3933, 5135), (4485, 4503)]