19985680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1747}}^1$

素因数の和:1784

約数の個数: 80

約数和(自身を含む): 54621504

約数和(自身を除く): 34635824

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 40, 44, 52, 55, 65, 80, 88, 104, 110, 130, 143, 176, 208, 220, 260, 286, 440, 520, 572, 715, 880, 1040, 1144, 1430, 1747, 2288, 2860, 3494, 5720, 6988, 8735, 11440, 13976, 17470, 19217, 22711, 27952, 34940, 38434, 45422, 69880, 76868, 90844, 96085, 113555, 139760, 153736, 181688, 192170, 227110, 249821, 307472, 363376, 384340, 454220, 499642, 768680, 908440, 999284, 1249105, 1537360, 1816880, 1998568, 2498210, 3997136, 4996420, 9992840, 19985680]

約数ペア:

[(1, 19985680), (2, 9992840), (4, 4996420), (5, 3997136), (8, 2498210), (10, 1998568), (11, 1816880), (13, 1537360), (16, 1249105), (20, 999284), (22, 908440), (26, 768680), (40, 499642), (44, 454220), (52, 384340), (55, 363376), (65, 307472), (80, 249821), (88, 227110), (104, 192170), (110, 181688), (130, 153736), (143, 139760), (176, 113555), (208, 96085), (220, 90844), (260, 76868), (286, 69880), (440, 45422), (520, 38434), (572, 34940), (715, 27952), (880, 22711), (1040, 19217), (1144, 17470), (1430, 13976), (1747, 11440), (2288, 8735), (2860, 6988), (3494, 5720)]