399804920

素因数分解:

$2^3\times 5^1\times {\mathrm{1723}}^1\times {\mathrm{5801}}^1$

素因数の和:7535

約数の個数: 32

約数和(自身を含む): 900238320

約数和(自身を除く): 500433400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1723, 3446, 5801, 6892, 8615, 11602, 13784, 17230, 23204, 29005, 34460, 46408, 58010, 68920, 116020, 232040, 9995123, 19990246, 39980492, 49975615, 79960984, 99951230, 199902460, 399804920]

約数ペア:

[(1, 399804920), (2, 199902460), (4, 99951230), (5, 79960984), (8, 49975615), (10, 39980492), (20, 19990246), (40, 9995123), (1723, 232040), (3446, 116020), (5801, 68920), (6892, 58010), (8615, 46408), (11602, 34460), (13784, 29005), (17230, 23204)]