19971910

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{40759}}^1$

素因数の和:40780

約数の個数: 24

約数和(自身を含む): 41819760

約数和(自身を除く): 21847850

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 40759, 81518, 203795, 285313, 407590, 570626, 1426565, 1997191, 2853130, 3994382, 9985955, 19971910]

約数ペア:

[(1, 19971910), (2, 9985955), (5, 3994382), (7, 2853130), (10, 1997191), (14, 1426565), (35, 570626), (49, 407590), (70, 285313), (98, 203795), (245, 81518), (490, 40759)]