19991380

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12043}}^1$

素因数の和:12135

約数の個数: 24

約数和(自身を含む): 42491232

約数和(自身を除く): 22499852

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12043, 24086, 48172, 60215, 120430, 240860, 999569, 1999138, 3998276, 4997845, 9995690, 19991380]

約数ペア:

[(1, 19991380), (2, 9995690), (4, 4997845), (5, 3998276), (10, 1999138), (20, 999569), (83, 240860), (166, 120430), (332, 60215), (415, 48172), (830, 24086), (1660, 12043)]