2991940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:137

約数の個数: 72

約数和(自身を含む): 7584192

約数和(自身を除く): 4592252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 71, 86, 98, 140, 142, 172, 196, 215, 245, 284, 301, 355, 430, 490, 497, 602, 710, 860, 980, 994, 1204, 1420, 1505, 1988, 2107, 2485, 3010, 3053, 3479, 4214, 4970, 6020, 6106, 6958, 8428, 9940, 10535, 12212, 13916, 15265, 17395, 21070, 21371, 30530, 34790, 42140, 42742, 61060, 69580, 85484, 106855, 149597, 213710, 299194, 427420, 598388, 747985, 1495970, 2991940]

約数ペア:

[(1, 2991940), (2, 1495970), (4, 747985), (5, 598388), (7, 427420), (10, 299194), (14, 213710), (20, 149597), (28, 106855), (35, 85484), (43, 69580), (49, 61060), (70, 42742), (71, 42140), (86, 34790), (98, 30530), (140, 21371), (142, 21070), (172, 17395), (196, 15265), (215, 13916), (245, 12212), (284, 10535), (301, 9940), (355, 8428), (430, 6958), (490, 6106), (497, 6020), (602, 4970), (710, 4214), (860, 3479), (980, 3053), (994, 3010), (1204, 2485), (1420, 2107), (1505, 1988)]