201217720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{229}}^1\times {\mathrm{1997}}^1$

素因数の和:2248

約数の個数: 64

約数和(自身を含む): 496303200

約数和(自身を除く): 295085480

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 229, 440, 458, 916, 1145, 1832, 1997, 2290, 2519, 3994, 4580, 5038, 7988, 9160, 9985, 10076, 12595, 15976, 19970, 20152, 21967, 25190, 39940, 43934, 50380, 79880, 87868, 100760, 109835, 175736, 219670, 439340, 457313, 878680, 914626, 1829252, 2286565, 3658504, 4573130, 5030443, 9146260, 10060886, 18292520, 20121772, 25152215, 40243544, 50304430, 100608860, 201217720]

約数ペア:

[(1, 201217720), (2, 100608860), (4, 50304430), (5, 40243544), (8, 25152215), (10, 20121772), (11, 18292520), (20, 10060886), (22, 9146260), (40, 5030443), (44, 4573130), (55, 3658504), (88, 2286565), (110, 1829252), (220, 914626), (229, 878680), (440, 457313), (458, 439340), (916, 219670), (1145, 175736), (1832, 109835), (1997, 100760), (2290, 87868), (2519, 79880), (3994, 50380), (4580, 43934), (5038, 39940), (7988, 25190), (9160, 21967), (9985, 20152), (10076, 19970), (12595, 15976)]