12800920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{619}}^1$

素因数の和:688

約数の個数: 64

約数和(自身を含む): 32140800

約数和(自身を除く): 19339880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 619, 940, 1034, 1238, 1880, 2068, 2476, 2585, 3095, 4136, 4952, 5170, 6190, 6809, 10340, 12380, 13618, 20680, 24760, 27236, 29093, 34045, 54472, 58186, 68090, 116372, 136180, 145465, 232744, 272360, 290930, 320023, 581860, 640046, 1163720, 1280092, 1600115, 2560184, 3200230, 6400460, 12800920]

約数ペア:

[(1, 12800920), (2, 6400460), (4, 3200230), (5, 2560184), (8, 1600115), (10, 1280092), (11, 1163720), (20, 640046), (22, 581860), (40, 320023), (44, 290930), (47, 272360), (55, 232744), (88, 145465), (94, 136180), (110, 116372), (188, 68090), (220, 58186), (235, 54472), (376, 34045), (440, 29093), (470, 27236), (517, 24760), (619, 20680), (940, 13618), (1034, 12380), (1238, 10340), (1880, 6809), (2068, 6190), (2476, 5170), (2585, 4952), (3095, 4136)]