311320

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 720720

約数和(自身を除く): 409400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 181, 215, 344, 362, 430, 724, 860, 905, 1448, 1720, 1810, 3620, 7240, 7783, 15566, 31132, 38915, 62264, 77830, 155660, 311320]

約数ペア:

[(1, 311320), (2, 155660), (4, 77830), (5, 62264), (8, 38915), (10, 31132), (20, 15566), (40, 7783), (43, 7240), (86, 3620), (172, 1810), (181, 1720), (215, 1448), (344, 905), (362, 860), (430, 724)]