19964720

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{521}}^1$

素因数の和:1013

約数の個数: 40

約数和(自身を含む): 46604160

約数和(自身を除く): 26639440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 521, 958, 1042, 1916, 2084, 2395, 2605, 3832, 4168, 4790, 5210, 7664, 8336, 9580, 10420, 19160, 20840, 38320, 41680, 249559, 499118, 998236, 1247795, 1996472, 2495590, 3992944, 4991180, 9982360, 19964720]

約数ペア:

[(1, 19964720), (2, 9982360), (4, 4991180), (5, 3992944), (8, 2495590), (10, 1996472), (16, 1247795), (20, 998236), (40, 499118), (80, 249559), (479, 41680), (521, 38320), (958, 20840), (1042, 19160), (1916, 10420), (2084, 9580), (2395, 8336), (2605, 7664), (3832, 5210), (4168, 4790)]