18778864

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{659}}^1$

素因数の和:817

約数の個数: 40

約数和(自身を含む): 39528720

約数和(自身を除く): 20749856

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 137, 208, 274, 548, 659, 1096, 1318, 1781, 2192, 2636, 3562, 5272, 7124, 8567, 10544, 14248, 17134, 28496, 34268, 68536, 90283, 137072, 180566, 361132, 722264, 1173679, 1444528, 2347358, 4694716, 9389432, 18778864]

約数ペア:

[(1, 18778864), (2, 9389432), (4, 4694716), (8, 2347358), (13, 1444528), (16, 1173679), (26, 722264), (52, 361132), (104, 180566), (137, 137072), (208, 90283), (274, 68536), (548, 34268), (659, 28496), (1096, 17134), (1318, 14248), (1781, 10544), (2192, 8567), (2636, 7124), (3562, 5272)]