20641360

素因数分解:

$2^4\times 5^1\times {\mathrm{67}}^1\times {\mathrm{3851}}^1$

素因数の和:3931

約数の個数: 40

約数和(自身を含む): 48720096

約数和(自身を除く): 28078736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 67, 80, 134, 268, 335, 536, 670, 1072, 1340, 2680, 3851, 5360, 7702, 15404, 19255, 30808, 38510, 61616, 77020, 154040, 258017, 308080, 516034, 1032068, 1290085, 2064136, 2580170, 4128272, 5160340, 10320680, 20641360]

約数ペア:

[(1, 20641360), (2, 10320680), (4, 5160340), (5, 4128272), (8, 2580170), (10, 2064136), (16, 1290085), (20, 1032068), (40, 516034), (67, 308080), (80, 258017), (134, 154040), (268, 77020), (335, 61616), (536, 38510), (670, 30808), (1072, 19255), (1340, 15404), (2680, 7702), (3851, 5360)]