19705760

素因数分解:

$2^5\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1559}}^1$

素因数の和:1653

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 27468640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 79, 80, 158, 160, 316, 395, 632, 790, 1264, 1559, 1580, 2528, 3118, 3160, 6236, 6320, 7795, 12472, 12640, 15590, 24944, 31180, 49888, 62360, 123161, 124720, 246322, 249440, 492644, 615805, 985288, 1231610, 1970576, 2463220, 3941152, 4926440, 9852880, 19705760]

約数ペア:

[(1, 19705760), (2, 9852880), (4, 4926440), (5, 3941152), (8, 2463220), (10, 1970576), (16, 1231610), (20, 985288), (32, 615805), (40, 492644), (79, 249440), (80, 246322), (158, 124720), (160, 123161), (316, 62360), (395, 49888), (632, 31180), (790, 24944), (1264, 15590), (1559, 12640), (1580, 12472), (2528, 7795), (3118, 6320), (3160, 6236)]