19994107

素因数分解:

$7^2\times {\mathrm{23}}^1\times {\mathrm{113}}^1\times {\mathrm{157}}^1$

素因数の和:307

約数の個数: 24

約数和(自身を含む): 24640416

約数和(自身を除く): 4646309

約数列:

[1, 7, 23, 49, 113, 157, 161, 791, 1099, 1127, 2599, 3611, 5537, 7693, 17741, 18193, 25277, 124187, 127351, 176939, 408043, 869309, 2856301, 19994107]

約数ペア:

[(1, 19994107), (7, 2856301), (23, 869309), (49, 408043), (113, 176939), (157, 127351), (161, 124187), (791, 25277), (1099, 18193), (1127, 17741), (2599, 7693), (3611, 5537)]