19877980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{547}}^1$

素因数の和:658

約数の個数: 48

約数和(自身を含む): 44190720

約数和(自身を除く): 24312740

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 79, 92, 115, 158, 230, 316, 395, 460, 547, 790, 1094, 1580, 1817, 2188, 2735, 3634, 5470, 7268, 9085, 10940, 12581, 18170, 25162, 36340, 43213, 50324, 62905, 86426, 125810, 172852, 216065, 251620, 432130, 864260, 993899, 1987798, 3975596, 4969495, 9938990, 19877980]

約数ペア:

[(1, 19877980), (2, 9938990), (4, 4969495), (5, 3975596), (10, 1987798), (20, 993899), (23, 864260), (46, 432130), (79, 251620), (92, 216065), (115, 172852), (158, 125810), (230, 86426), (316, 62905), (395, 50324), (460, 43213), (547, 36340), (790, 25162), (1094, 18170), (1580, 12581), (1817, 10940), (2188, 9085), (2735, 7268), (3634, 5470)]