19181655

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{431}}^1$

素因数の和:508

約数の個数: 48

約数和(自身を含む): 35582976

約数和(自身を除く): 16401321

約数列:

[1, 3, 5, 9, 15, 23, 43, 45, 69, 115, 129, 207, 215, 345, 387, 431, 645, 989, 1035, 1293, 1935, 2155, 2967, 3879, 4945, 6465, 8901, 9913, 14835, 18533, 19395, 29739, 44505, 49565, 55599, 89217, 92665, 148695, 166797, 277995, 426259, 446085, 833985, 1278777, 2131295, 3836331, 6393885, 19181655]

約数ペア:

[(1, 19181655), (3, 6393885), (5, 3836331), (9, 2131295), (15, 1278777), (23, 833985), (43, 446085), (45, 426259), (69, 277995), (115, 166797), (129, 148695), (207, 92665), (215, 89217), (345, 55599), (387, 49565), (431, 44505), (645, 29739), (989, 19395), (1035, 18533), (1293, 14835), (1935, 9913), (2155, 8901), (2967, 6465), (3879, 4945)]