81942520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:197

約数の個数: 128

約数和(自身を含む): 212129280

約数和(自身を除く): 130186760

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 61, 71, 86, 88, 110, 122, 142, 172, 215, 220, 244, 284, 305, 344, 355, 430, 440, 473, 488, 568, 610, 671, 710, 781, 860, 946, 1220, 1342, 1420, 1562, 1720, 1892, 2365, 2440, 2623, 2684, 2840, 3053, 3124, 3355, 3784, 3905, 4331, 4730, 5246, 5368, 6106, 6248, 6710, 7810, 8662, 9460, 10492, 12212, 13115, 13420, 15265, 15620, 17324, 18920, 20984, 21655, 24424, 26230, 26840, 28853, 30530, 31240, 33583, 34648, 43310, 47641, 52460, 57706, 61060, 67166, 86620, 95282, 104920, 115412, 122120, 134332, 144265, 167915, 173240, 186233, 190564, 230824, 238205, 268664, 288530, 335830, 372466, 381128, 476410, 577060, 671660, 744932, 931165, 952820, 1154120, 1343320, 1489864, 1862330, 1905640, 2048563, 3724660, 4097126, 7449320, 8194252, 10242815, 16388504, 20485630, 40971260, 81942520]

約数ペア:

[(1, 81942520), (2, 40971260), (4, 20485630), (5, 16388504), (8, 10242815), (10, 8194252), (11, 7449320), (20, 4097126), (22, 3724660), (40, 2048563), (43, 1905640), (44, 1862330), (55, 1489864), (61, 1343320), (71, 1154120), (86, 952820), (88, 931165), (110, 744932), (122, 671660), (142, 577060), (172, 476410), (215, 381128), (220, 372466), (244, 335830), (284, 288530), (305, 268664), (344, 238205), (355, 230824), (430, 190564), (440, 186233), (473, 173240), (488, 167915), (568, 144265), (610, 134332), (671, 122120), (710, 115412), (781, 104920), (860, 95282), (946, 86620), (1220, 67166), (1342, 61060), (1420, 57706), (1562, 52460), (1720, 47641), (1892, 43310), (2365, 34648), (2440, 33583), (2623, 31240), (2684, 30530), (2840, 28853), (3053, 26840), (3124, 26230), (3355, 24424), (3784, 21655), (3905, 20984), (4331, 18920), (4730, 17324), (5246, 15620), (5368, 15265), (6106, 13420), (6248, 13115), (6710, 12212), (7810, 10492), (8662, 9460)]