19927719

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 34524672

約数和(自身を除く): 14596953

約数列:

[1, 3, 7, 9, 21, 37, 63, 83, 103, 111, 249, 259, 309, 333, 581, 721, 747, 777, 927, 1743, 2163, 2331, 3071, 3811, 5229, 6489, 8549, 9213, 11433, 21497, 25647, 26677, 27639, 34299, 59843, 64491, 76941, 80031, 179529, 193473, 240093, 316313, 538587, 948939, 2214191, 2846817, 6642573, 19927719]

約数ペア:

[(1, 19927719), (3, 6642573), (7, 2846817), (9, 2214191), (21, 948939), (37, 538587), (63, 316313), (83, 240093), (103, 193473), (111, 179529), (249, 80031), (259, 76941), (309, 64491), (333, 59843), (581, 34299), (721, 27639), (747, 26677), (777, 25647), (927, 21497), (1743, 11433), (2163, 9213), (2331, 8549), (3071, 6489), (3811, 5229)]