81506560

素因数分解:

$2^8\times 5^1\times {\mathrm{37}}^1\times {\mathrm{1721}}^1$

素因数の和:1779

約数の個数: 72

約数和(自身を含む): 200626776

約数和(自身を除く): 119120216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 64, 74, 80, 128, 148, 160, 185, 256, 296, 320, 370, 592, 640, 740, 1184, 1280, 1480, 1721, 2368, 2960, 3442, 4736, 5920, 6884, 8605, 9472, 11840, 13768, 17210, 23680, 27536, 34420, 47360, 55072, 63677, 68840, 110144, 127354, 137680, 220288, 254708, 275360, 318385, 440576, 509416, 550720, 636770, 1018832, 1101440, 1273540, 2037664, 2202880, 2547080, 4075328, 5094160, 8150656, 10188320, 16301312, 20376640, 40753280, 81506560]

約数ペア:

[(1, 81506560), (2, 40753280), (4, 20376640), (5, 16301312), (8, 10188320), (10, 8150656), (16, 5094160), (20, 4075328), (32, 2547080), (37, 2202880), (40, 2037664), (64, 1273540), (74, 1101440), (80, 1018832), (128, 636770), (148, 550720), (160, 509416), (185, 440576), (256, 318385), (296, 275360), (320, 254708), (370, 220288), (592, 137680), (640, 127354), (740, 110144), (1184, 68840), (1280, 63677), (1480, 55072), (1721, 47360), (2368, 34420), (2960, 27536), (3442, 23680), (4736, 17210), (5920, 13768), (6884, 11840), (8605, 9472)]