21288813

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{2689}}^1$

素因数の和:2741

約数の個数: 32

約数和(自身を含む): 36153600

約数和(自身を除く): 14864787

約数列:

[1, 3, 7, 13, 21, 29, 39, 87, 91, 203, 273, 377, 609, 1131, 2639, 2689, 7917, 8067, 18823, 34957, 56469, 77981, 104871, 233943, 244699, 545867, 734097, 1013753, 1637601, 3041259, 7096271, 21288813]

約数ペア:

[(1, 21288813), (3, 7096271), (7, 3041259), (13, 1637601), (21, 1013753), (29, 734097), (39, 545867), (87, 244699), (91, 233943), (203, 104871), (273, 77981), (377, 56469), (609, 34957), (1131, 18823), (2639, 8067), (2689, 7917)]