19991800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5261}}^1$

素因数の和:5296

約数の個数: 48

約数和(自身を含む): 48936600

約数和(自身を除く): 28944800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5261, 10522, 21044, 26305, 42088, 52610, 99959, 105220, 131525, 199918, 210440, 263050, 399836, 499795, 526100, 799672, 999590, 1052200, 1999180, 2498975, 3998360, 4997950, 9995900, 19991800]

約数ペア:

[(1, 19991800), (2, 9995900), (4, 4997950), (5, 3998360), (8, 2498975), (10, 1999180), (19, 1052200), (20, 999590), (25, 799672), (38, 526100), (40, 499795), (50, 399836), (76, 263050), (95, 210440), (100, 199918), (152, 131525), (190, 105220), (200, 99959), (380, 52610), (475, 42088), (760, 26305), (950, 21044), (1900, 10522), (3800, 5261)]