20191240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1291}}^1$

素因数の和:1342

約数の個数: 64

約数和(自身を含む): 50232960

約数和(自身を除く): 30041720

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1291, 1564, 1955, 2582, 3128, 3910, 5164, 6455, 7820, 10328, 12910, 15640, 21947, 25820, 29693, 43894, 51640, 59386, 87788, 109735, 118772, 148465, 175576, 219470, 237544, 296930, 438940, 504781, 593860, 877880, 1009562, 1187720, 2019124, 2523905, 4038248, 5047810, 10095620, 20191240]

約数ペア:

[(1, 20191240), (2, 10095620), (4, 5047810), (5, 4038248), (8, 2523905), (10, 2019124), (17, 1187720), (20, 1009562), (23, 877880), (34, 593860), (40, 504781), (46, 438940), (68, 296930), (85, 237544), (92, 219470), (115, 175576), (136, 148465), (170, 118772), (184, 109735), (230, 87788), (340, 59386), (391, 51640), (460, 43894), (680, 29693), (782, 25820), (920, 21947), (1291, 15640), (1564, 12910), (1955, 10328), (2582, 7820), (3128, 6455), (3910, 5164)]