72400520

素因数分解:

$2^3\times 5^1\times {\mathrm{1810013}}^1$

素因数の和:1810024

約数の個数: 16

約数和(自身を含む): 162901260

約数和(自身を除く): 90500740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1810013, 3620026, 7240052, 9050065, 14480104, 18100130, 36200260, 72400520]

約数ペア:

[(1, 72400520), (2, 36200260), (4, 18100130), (5, 14480104), (8, 9050065), (10, 7240052), (20, 3620026), (40, 1810013)]