78020020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2753}}^1$

素因数の和:2884

約数の個数: 48

約数和(自身を含む): 178128720

約数和(自身を除く): 100108700

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 109, 130, 218, 260, 436, 545, 1090, 1417, 2180, 2753, 2834, 5506, 5668, 7085, 11012, 13765, 14170, 27530, 28340, 35789, 55060, 71578, 143156, 178945, 300077, 357890, 600154, 715780, 1200308, 1500385, 3000770, 3901001, 6001540, 7802002, 15604004, 19505005, 39010010, 78020020]

約数ペア:

[(1, 78020020), (2, 39010010), (4, 19505005), (5, 15604004), (10, 7802002), (13, 6001540), (20, 3901001), (26, 3000770), (52, 1500385), (65, 1200308), (109, 715780), (130, 600154), (218, 357890), (260, 300077), (436, 178945), (545, 143156), (1090, 71578), (1417, 55060), (2180, 35789), (2753, 28340), (2834, 27530), (5506, 14170), (5668, 13765), (7085, 11012)]