19581440

素因数分解:

$2^9\times 5^1\times {\mathrm{7649}}^1$

素因数の和:7672

約数の個数: 40

約数和(自身を含む): 46955700

約数和(自身を除く): 27374260

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 7649, 15298, 30596, 38245, 61192, 76490, 122384, 152980, 244768, 305960, 489536, 611920, 979072, 1223840, 1958144, 2447680, 3916288, 4895360, 9790720, 19581440]

約数ペア:

[(1, 19581440), (2, 9790720), (4, 4895360), (5, 3916288), (8, 2447680), (10, 1958144), (16, 1223840), (20, 979072), (32, 611920), (40, 489536), (64, 305960), (80, 244768), (128, 152980), (160, 122384), (256, 76490), (320, 61192), (512, 38245), (640, 30596), (1280, 15298), (2560, 7649)]