20353520

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1$

素因数の和:354

約数の個数: 80

約数和(自身を含む): 52362720

約数和(自身を除く): 32009200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 101, 110, 176, 202, 220, 229, 404, 440, 458, 505, 808, 880, 916, 1010, 1111, 1145, 1616, 1832, 2020, 2222, 2290, 2519, 3664, 4040, 4444, 4580, 5038, 5555, 8080, 8888, 9160, 10076, 11110, 12595, 17776, 18320, 20152, 22220, 23129, 25190, 40304, 44440, 46258, 50380, 88880, 92516, 100760, 115645, 185032, 201520, 231290, 254419, 370064, 462580, 508838, 925160, 1017676, 1272095, 1850320, 2035352, 2544190, 4070704, 5088380, 10176760, 20353520]

約数ペア:

[(1, 20353520), (2, 10176760), (4, 5088380), (5, 4070704), (8, 2544190), (10, 2035352), (11, 1850320), (16, 1272095), (20, 1017676), (22, 925160), (40, 508838), (44, 462580), (55, 370064), (80, 254419), (88, 231290), (101, 201520), (110, 185032), (176, 115645), (202, 100760), (220, 92516), (229, 88880), (404, 50380), (440, 46258), (458, 44440), (505, 40304), (808, 25190), (880, 23129), (916, 22220), (1010, 20152), (1111, 18320), (1145, 17776), (1616, 12595), (1832, 11110), (2020, 10076), (2222, 9160), (2290, 8888), (2519, 8080), (3664, 5555), (4040, 5038), (4444, 4580)]