19981010

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{397}}^1\times {\mathrm{719}}^1$

素因数の和:1130

約数の個数: 32

約数和(自身を含む): 41264640

約数和(自身を除く): 21283630

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 397, 719, 794, 1438, 1985, 2779, 3595, 3970, 5033, 5558, 7190, 10066, 13895, 25165, 27790, 50330, 285443, 570886, 1427215, 1998101, 2854430, 3996202, 9990505, 19981010]

約数ペア:

[(1, 19981010), (2, 9990505), (5, 3996202), (7, 2854430), (10, 1998101), (14, 1427215), (35, 570886), (70, 285443), (397, 50330), (719, 27790), (794, 25165), (1438, 13895), (1985, 10066), (2779, 7190), (3595, 5558), (3970, 5033)]