21939723

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 36900864

約数和(自身を除く): 14961141

約数列:

[1, 3, 9, 13, 23, 31, 39, 69, 93, 117, 207, 263, 279, 299, 403, 713, 789, 897, 1209, 2139, 2367, 2691, 3419, 3627, 6049, 6417, 8153, 9269, 10257, 18147, 24459, 27807, 30771, 54441, 73377, 78637, 83421, 105989, 187519, 235911, 317967, 562557, 707733, 953901, 1687671, 2437747, 7313241, 21939723]

約数ペア:

[(1, 21939723), (3, 7313241), (9, 2437747), (13, 1687671), (23, 953901), (31, 707733), (39, 562557), (69, 317967), (93, 235911), (117, 187519), (207, 105989), (263, 83421), (279, 78637), (299, 73377), (403, 54441), (713, 30771), (789, 27807), (897, 24459), (1209, 18147), (2139, 10257), (2367, 9269), (2691, 8153), (3419, 6417), (3627, 6049)]