27721240

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{227}}^1$

素因数の和:352

約数の個数: 64

約数和(自身を含む): 65007360

約数和(自身を除く): 37286120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 71, 86, 142, 172, 215, 227, 284, 344, 355, 430, 454, 568, 710, 860, 908, 1135, 1420, 1720, 1816, 2270, 2840, 3053, 4540, 6106, 9080, 9761, 12212, 15265, 16117, 19522, 24424, 30530, 32234, 39044, 48805, 61060, 64468, 78088, 80585, 97610, 122120, 128936, 161170, 195220, 322340, 390440, 644680, 693031, 1386062, 2772124, 3465155, 5544248, 6930310, 13860620, 27721240]

約数ペア:

[(1, 27721240), (2, 13860620), (4, 6930310), (5, 5544248), (8, 3465155), (10, 2772124), (20, 1386062), (40, 693031), (43, 644680), (71, 390440), (86, 322340), (142, 195220), (172, 161170), (215, 128936), (227, 122120), (284, 97610), (344, 80585), (355, 78088), (430, 64468), (454, 61060), (568, 48805), (710, 39044), (860, 32234), (908, 30530), (1135, 24424), (1420, 19522), (1720, 16117), (1816, 15265), (2270, 12212), (2840, 9761), (3053, 9080), (4540, 6106)]