18111440

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 44520960

約数和(自身を除く): 26409520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 67, 80, 109, 124, 134, 155, 218, 248, 268, 310, 335, 436, 496, 536, 545, 620, 670, 872, 1072, 1090, 1240, 1340, 1744, 2077, 2180, 2480, 2680, 3379, 4154, 4360, 5360, 6758, 7303, 8308, 8720, 10385, 13516, 14606, 16616, 16895, 20770, 27032, 29212, 33232, 33790, 36515, 41540, 54064, 58424, 67580, 73030, 83080, 116848, 135160, 146060, 166160, 226393, 270320, 292120, 452786, 584240, 905572, 1131965, 1811144, 2263930, 3622288, 4527860, 9055720, 18111440]

約数ペア:

[(1, 18111440), (2, 9055720), (4, 4527860), (5, 3622288), (8, 2263930), (10, 1811144), (16, 1131965), (20, 905572), (31, 584240), (40, 452786), (62, 292120), (67, 270320), (80, 226393), (109, 166160), (124, 146060), (134, 135160), (155, 116848), (218, 83080), (248, 73030), (268, 67580), (310, 58424), (335, 54064), (436, 41540), (496, 36515), (536, 33790), (545, 33232), (620, 29212), (670, 27032), (872, 20770), (1072, 16895), (1090, 16616), (1240, 14606), (1340, 13516), (1744, 10385), (2077, 8720), (2180, 8308), (2480, 7303), (2680, 6758), (3379, 5360), (4154, 4360)]