81988020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{455489}}^1$

素因数の和:455504

約数の個数: 36

約数和(自身を含む): 248697540

約数和(自身を除く): 166709520

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 455489, 910978, 1366467, 1821956, 2277445, 2732934, 4099401, 4554890, 5465868, 6832335, 8198802, 9109780, 13664670, 16397604, 20497005, 27329340, 40994010, 81988020]

約数ペア:

[(1, 81988020), (2, 40994010), (3, 27329340), (4, 20497005), (5, 16397604), (6, 13664670), (9, 9109780), (10, 8198802), (12, 6832335), (15, 5465868), (18, 4554890), (20, 4099401), (30, 2732934), (36, 2277445), (45, 1821956), (60, 1366467), (90, 910978), (180, 455489)]