20329460

素因数分解:

$2^2\times 5^1\times {\mathrm{509}}^1\times {\mathrm{1997}}^1$

素因数の和:2515

約数の個数: 24

約数和(自身を含む): 42797160

約数和(自身を除く): 22467700

約数列:

[1, 2, 4, 5, 10, 20, 509, 1018, 1997, 2036, 2545, 3994, 5090, 7988, 9985, 10180, 19970, 39940, 1016473, 2032946, 4065892, 5082365, 10164730, 20329460]

約数ペア:

[(1, 20329460), (2, 10164730), (4, 5082365), (5, 4065892), (10, 2032946), (20, 1016473), (509, 39940), (1018, 19970), (1997, 10180), (2036, 9985), (2545, 7988), (3994, 5090)]