20320937

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1$

素因数の和:142

約数の個数: 48

約数和(自身を含む): 28344960

約数和(自身を除く): 8024023

約数列:

[1, 7, 13, 19, 23, 49, 73, 91, 133, 161, 247, 299, 437, 511, 637, 931, 949, 1127, 1387, 1679, 1729, 2093, 3059, 3577, 5681, 6643, 9709, 11753, 12103, 14651, 18031, 21413, 21827, 31901, 39767, 46501, 67963, 82271, 126217, 152789, 223307, 278369, 414713, 883519, 1069523, 1563149, 2902991, 20320937]

約数ペア:

[(1, 20320937), (7, 2902991), (13, 1563149), (19, 1069523), (23, 883519), (49, 414713), (73, 278369), (91, 223307), (133, 152789), (161, 126217), (247, 82271), (299, 67963), (437, 46501), (511, 39767), (637, 31901), (931, 21827), (949, 21413), (1127, 18031), (1387, 14651), (1679, 12103), (1729, 11753), (2093, 9709), (3059, 6643), (3577, 5681)]