21654178

素因数分解:

$2^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{739}}^1$

素因数の和:791

約数の個数: 48

約数和(自身を含む): 42517440

約数和(自身を除く): 20863262

約数列:

[1, 2, 7, 13, 14, 23, 26, 46, 49, 91, 98, 161, 182, 299, 322, 598, 637, 739, 1127, 1274, 1478, 2093, 2254, 4186, 5173, 9607, 10346, 14651, 16997, 19214, 29302, 33994, 36211, 67249, 72422, 118979, 134498, 220961, 237958, 441922, 470743, 832853, 941486, 1546727, 1665706, 3093454, 10827089, 21654178]

約数ペア:

[(1, 21654178), (2, 10827089), (7, 3093454), (13, 1665706), (14, 1546727), (23, 941486), (26, 832853), (46, 470743), (49, 441922), (91, 237958), (98, 220961), (161, 134498), (182, 118979), (299, 72422), (322, 67249), (598, 36211), (637, 33994), (739, 29302), (1127, 19214), (1274, 16997), (1478, 14651), (2093, 10346), (2254, 9607), (4186, 5173)]