7800040

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1789}}^1$

素因数の和:1909

約数の個数: 32

約数和(自身を含む): 17721000

約数和(自身を除く): 9920960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 1789, 2180, 3578, 4360, 7156, 8945, 14312, 17890, 35780, 71560, 195001, 390002, 780004, 975005, 1560008, 1950010, 3900020, 7800040]

約数ペア:

[(1, 7800040), (2, 3900020), (4, 1950010), (5, 1560008), (8, 975005), (10, 780004), (20, 390002), (40, 195001), (109, 71560), (218, 35780), (436, 17890), (545, 14312), (872, 8945), (1090, 7156), (1789, 4360), (2180, 3578)]