21503079

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{569}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 37346400

約数和(自身を除く): 15843321

約数列:

[1, 3, 9, 13, 17, 19, 39, 51, 57, 117, 153, 171, 221, 247, 323, 569, 663, 741, 969, 1707, 1989, 2223, 2907, 4199, 5121, 7397, 9673, 10811, 12597, 22191, 29019, 32433, 37791, 66573, 87057, 97299, 125749, 140543, 183787, 377247, 421629, 551361, 1131741, 1264887, 1654083, 2389231, 7167693, 21503079]

約数ペア:

[(1, 21503079), (3, 7167693), (9, 2389231), (13, 1654083), (17, 1264887), (19, 1131741), (39, 551361), (51, 421629), (57, 377247), (117, 183787), (153, 140543), (171, 125749), (221, 97299), (247, 87057), (323, 66573), (569, 37791), (663, 32433), (741, 29019), (969, 22191), (1707, 12597), (1989, 10811), (2223, 9673), (2907, 7397), (4199, 5121)]