81200080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163}}^1\times {\mathrm{479}}^1$

素因数の和:668

約数の個数: 80

約数和(自身を含む): 204986880

約数和(自身を除く): 123786800

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 163, 208, 260, 326, 479, 520, 652, 815, 958, 1040, 1304, 1630, 1916, 2119, 2395, 2608, 3260, 3832, 4238, 4790, 6227, 6520, 7664, 8476, 9580, 10595, 12454, 13040, 16952, 19160, 21190, 24908, 31135, 33904, 38320, 42380, 49816, 62270, 78077, 84760, 99632, 124540, 156154, 169520, 249080, 312308, 390385, 498160, 624616, 780770, 1015001, 1249232, 1561540, 2030002, 3123080, 4060004, 5075005, 6246160, 8120008, 10150010, 16240016, 20300020, 40600040, 81200080]

約数ペア:

[(1, 81200080), (2, 40600040), (4, 20300020), (5, 16240016), (8, 10150010), (10, 8120008), (13, 6246160), (16, 5075005), (20, 4060004), (26, 3123080), (40, 2030002), (52, 1561540), (65, 1249232), (80, 1015001), (104, 780770), (130, 624616), (163, 498160), (208, 390385), (260, 312308), (326, 249080), (479, 169520), (520, 156154), (652, 124540), (815, 99632), (958, 84760), (1040, 78077), (1304, 62270), (1630, 49816), (1916, 42380), (2119, 38320), (2395, 33904), (2608, 31135), (3260, 24908), (3832, 21190), (4238, 19160), (4790, 16952), (6227, 13040), (6520, 12454), (7664, 10595), (8476, 9580)]