18579440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{491}}^1$

素因数の和:558

約数の個数: 80

約数和(自身を含む): 48318336

約数和(自身を除く): 29738896

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 43, 44, 55, 80, 86, 88, 110, 172, 176, 215, 220, 344, 430, 440, 473, 491, 688, 860, 880, 946, 982, 1720, 1892, 1964, 2365, 2455, 3440, 3784, 3928, 4730, 4910, 5401, 7568, 7856, 9460, 9820, 10802, 18920, 19640, 21113, 21604, 27005, 37840, 39280, 42226, 43208, 54010, 84452, 86416, 105565, 108020, 168904, 211130, 216040, 232243, 337808, 422260, 432080, 464486, 844520, 928972, 1161215, 1689040, 1857944, 2322430, 3715888, 4644860, 9289720, 18579440]

約数ペア:

[(1, 18579440), (2, 9289720), (4, 4644860), (5, 3715888), (8, 2322430), (10, 1857944), (11, 1689040), (16, 1161215), (20, 928972), (22, 844520), (40, 464486), (43, 432080), (44, 422260), (55, 337808), (80, 232243), (86, 216040), (88, 211130), (110, 168904), (172, 108020), (176, 105565), (215, 86416), (220, 84452), (344, 54010), (430, 43208), (440, 42226), (473, 39280), (491, 37840), (688, 27005), (860, 21604), (880, 21113), (946, 19640), (982, 18920), (1720, 10802), (1892, 9820), (1964, 9460), (2365, 7856), (2455, 7568), (3440, 5401), (3784, 4910), (3928, 4730)]