18100040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{509}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 47001600

約数和(自身を除く): 28901560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 509, 635, 889, 1016, 1018, 1270, 1778, 2036, 2540, 2545, 3556, 3563, 4072, 4445, 5080, 5090, 7112, 7126, 8890, 10180, 14252, 17780, 17815, 20360, 28504, 35560, 35630, 64643, 71260, 129286, 142520, 258572, 323215, 452501, 517144, 646430, 905002, 1292860, 1810004, 2262505, 2585720, 3620008, 4525010, 9050020, 18100040]

約数ペア:

[(1, 18100040), (2, 9050020), (4, 4525010), (5, 3620008), (7, 2585720), (8, 2262505), (10, 1810004), (14, 1292860), (20, 905002), (28, 646430), (35, 517144), (40, 452501), (56, 323215), (70, 258572), (127, 142520), (140, 129286), (254, 71260), (280, 64643), (508, 35630), (509, 35560), (635, 28504), (889, 20360), (1016, 17815), (1018, 17780), (1270, 14252), (1778, 10180), (2036, 8890), (2540, 7126), (2545, 7112), (3556, 5090), (3563, 5080), (4072, 4445)]