20682880

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1901}}^1$

素因数の和:1937

約数の個数: 64

約数和(自身を含む): 52381080

約数和(自身を除く): 31698200

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1901, 2176, 2720, 3802, 5440, 7604, 9505, 10880, 15208, 19010, 30416, 32317, 38020, 60832, 64634, 76040, 121664, 129268, 152080, 161585, 243328, 258536, 304160, 323170, 517072, 608320, 646340, 1034144, 1216640, 1292680, 2068288, 2585360, 4136576, 5170720, 10341440, 20682880]

約数ペア:

[(1, 20682880), (2, 10341440), (4, 5170720), (5, 4136576), (8, 2585360), (10, 2068288), (16, 1292680), (17, 1216640), (20, 1034144), (32, 646340), (34, 608320), (40, 517072), (64, 323170), (68, 304160), (80, 258536), (85, 243328), (128, 161585), (136, 152080), (160, 129268), (170, 121664), (272, 76040), (320, 64634), (340, 60832), (544, 38020), (640, 32317), (680, 30416), (1088, 19010), (1360, 15208), (1901, 10880), (2176, 9505), (2720, 7604), (3802, 5440)]