20518480

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13499}}^1$

素因数の和:13531

約数の個数: 40

約数和(自身を含む): 50220000

約数和(自身を除く): 29701520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13499, 26998, 53996, 67495, 107992, 134990, 215984, 256481, 269980, 512962, 539960, 1025924, 1079920, 1282405, 2051848, 2564810, 4103696, 5129620, 10259240, 20518480]

約数ペア:

[(1, 20518480), (2, 10259240), (4, 5129620), (5, 4103696), (8, 2564810), (10, 2051848), (16, 1282405), (19, 1079920), (20, 1025924), (38, 539960), (40, 512962), (76, 269980), (80, 256481), (95, 215984), (152, 134990), (190, 107992), (304, 67495), (380, 53996), (760, 26998), (1520, 13499)]