81372340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{1931}}^1$

素因数の和:1997

約数の個数: 72

約数和(自身を含む): 203509152

約数和(自身を除く): 122136812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 602, 860, 980, 1204, 1505, 1931, 2107, 3010, 3862, 4214, 6020, 7724, 8428, 9655, 10535, 13517, 19310, 21070, 27034, 38620, 42140, 54068, 67585, 83033, 94619, 135170, 166066, 189238, 270340, 332132, 378476, 415165, 473095, 581231, 830330, 946190, 1162462, 1660660, 1892380, 2324924, 2906155, 4068617, 5812310, 8137234, 11624620, 16274468, 20343085, 40686170, 81372340]

約数ペア:

[(1, 81372340), (2, 40686170), (4, 20343085), (5, 16274468), (7, 11624620), (10, 8137234), (14, 5812310), (20, 4068617), (28, 2906155), (35, 2324924), (43, 1892380), (49, 1660660), (70, 1162462), (86, 946190), (98, 830330), (140, 581231), (172, 473095), (196, 415165), (215, 378476), (245, 332132), (301, 270340), (430, 189238), (490, 166066), (602, 135170), (860, 94619), (980, 83033), (1204, 67585), (1505, 54068), (1931, 42140), (2107, 38620), (3010, 27034), (3862, 21070), (4214, 19310), (6020, 13517), (7724, 10535), (8428, 9655)]