19818968

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 40911480

約数和(自身を除く): 21092512

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 107, 137, 169, 214, 274, 338, 428, 548, 676, 856, 1096, 1352, 1391, 1781, 2782, 3562, 5564, 7124, 11128, 14248, 14659, 18083, 23153, 29318, 36166, 46306, 58636, 72332, 92612, 117272, 144664, 185224, 190567, 381134, 762268, 1524536, 2477371, 4954742, 9909484, 19818968]

約数ペア:

[(1, 19818968), (2, 9909484), (4, 4954742), (8, 2477371), (13, 1524536), (26, 762268), (52, 381134), (104, 190567), (107, 185224), (137, 144664), (169, 117272), (214, 92612), (274, 72332), (338, 58636), (428, 46306), (548, 36166), (676, 29318), (856, 23153), (1096, 18083), (1352, 14659), (1391, 14248), (1781, 11128), (2782, 7124), (3562, 5564)]