20441440

素因数分解:

$2^5\times 5^1\times {\mathrm{251}}^1\times {\mathrm{509}}^1$

素因数の和:775

約数の個数: 48

約数和(自身を含む): 48580560

約数和(自身を除く): 28139120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 251, 502, 509, 1004, 1018, 1255, 2008, 2036, 2510, 2545, 4016, 4072, 5020, 5090, 8032, 8144, 10040, 10180, 16288, 20080, 20360, 40160, 40720, 81440, 127759, 255518, 511036, 638795, 1022072, 1277590, 2044144, 2555180, 4088288, 5110360, 10220720, 20441440]

約数ペア:

[(1, 20441440), (2, 10220720), (4, 5110360), (5, 4088288), (8, 2555180), (10, 2044144), (16, 1277590), (20, 1022072), (32, 638795), (40, 511036), (80, 255518), (160, 127759), (251, 81440), (502, 40720), (509, 40160), (1004, 20360), (1018, 20080), (1255, 16288), (2008, 10180), (2036, 10040), (2510, 8144), (2545, 8032), (4016, 5090), (4072, 5020)]