21302480

素因数分解:

$2^4\times 5^1\times {\mathrm{266281}}^1$

素因数の和:266294

約数の個数: 20

約数和(自身を含む): 49528452

約数和(自身を除く): 28225972

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 266281, 532562, 1065124, 1331405, 2130248, 2662810, 4260496, 5325620, 10651240, 21302480]

約数ペア:

[(1, 21302480), (2, 10651240), (4, 5325620), (5, 4260496), (8, 2662810), (10, 2130248), (16, 1331405), (20, 1065124), (40, 532562), (80, 266281)]