81509940

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10531}}^1$

素因数の和:10589

約数の個数: 72

約数和(自身を含む): 253020768

約数和(自身を除く): 171510828

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 43, 45, 60, 86, 90, 129, 172, 180, 215, 258, 387, 430, 516, 645, 774, 860, 1290, 1548, 1935, 2580, 3870, 7740, 10531, 21062, 31593, 42124, 52655, 63186, 94779, 105310, 126372, 157965, 189558, 210620, 315930, 379116, 452833, 473895, 631860, 905666, 947790, 1358499, 1811332, 1895580, 2264165, 2716998, 4075497, 4528330, 5433996, 6792495, 8150994, 9056660, 13584990, 16301988, 20377485, 27169980, 40754970, 81509940]

約数ペア:

[(1, 81509940), (2, 40754970), (3, 27169980), (4, 20377485), (5, 16301988), (6, 13584990), (9, 9056660), (10, 8150994), (12, 6792495), (15, 5433996), (18, 4528330), (20, 4075497), (30, 2716998), (36, 2264165), (43, 1895580), (45, 1811332), (60, 1358499), (86, 947790), (90, 905666), (129, 631860), (172, 473895), (180, 452833), (215, 379116), (258, 315930), (387, 210620), (430, 189558), (516, 157965), (645, 126372), (774, 105310), (860, 94779), (1290, 63186), (1548, 52655), (1935, 42124), (2580, 31593), (3870, 21062), (7740, 10531)]