19918240

素因数分解:

$2^5\times 5^1\times {\mathrm{124489}}^1$

素因数の和:124504

約数の個数: 24

約数和(自身を含む): 47057220

約数和(自身を除く): 27138980

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 124489, 248978, 497956, 622445, 995912, 1244890, 1991824, 2489780, 3983648, 4979560, 9959120, 19918240]

約数ペア:

[(1, 19918240), (2, 9959120), (4, 4979560), (5, 3983648), (8, 2489780), (10, 1991824), (16, 1244890), (20, 995912), (32, 622445), (40, 497956), (80, 248978), (160, 124489)]