20381840

素因数分解:

$2^4\times 5^1\times {\mathrm{254773}}^1$

素因数の和:254786

約数の個数: 20

約数和(自身を含む): 47387964

約数和(自身を除く): 27006124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254773, 509546, 1019092, 1273865, 2038184, 2547730, 4076368, 5095460, 10190920, 20381840]

約数ペア:

[(1, 20381840), (2, 10190920), (4, 5095460), (5, 4076368), (8, 2547730), (10, 2038184), (16, 1273865), (20, 1019092), (40, 509546), (80, 254773)]