638828920

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{238369}}^1$

素因数の和:238447

約数の個数: 32

約数和(自身を含む): 1458824400

約数和(自身を除く): 819995480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 238369, 476738, 953476, 1191845, 1906952, 2383690, 4767380, 9534760, 15970723, 31941446, 63882892, 79853615, 127765784, 159707230, 319414460, 638828920]

約数ペア:

[(1, 638828920), (2, 319414460), (4, 159707230), (5, 127765784), (8, 79853615), (10, 63882892), (20, 31941446), (40, 15970723), (67, 9534760), (134, 4767380), (268, 2383690), (335, 1906952), (536, 1191845), (670, 953476), (1340, 476738), (2680, 238369)]