19742120

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{6761}}^1$

素因数の和:6845

約数の個数: 32

約数和(自身を含む): 45034920

約数和(自身を除く): 25292800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 6761, 13522, 27044, 33805, 54088, 67610, 135220, 270440, 493553, 987106, 1974212, 2467765, 3948424, 4935530, 9871060, 19742120]

約数ペア:

[(1, 19742120), (2, 9871060), (4, 4935530), (5, 3948424), (8, 2467765), (10, 1974212), (20, 987106), (40, 493553), (73, 270440), (146, 135220), (292, 67610), (365, 54088), (584, 33805), (730, 27044), (1460, 13522), (2920, 6761)]