21329985

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{233}}^1\times {\mathrm{359}}^1$

素因数の和:617

約数の個数: 32

約数和(自身を含む): 36391680

約数和(自身を除く): 15061695

約数列:

[1, 3, 5, 15, 17, 51, 85, 233, 255, 359, 699, 1077, 1165, 1795, 3495, 3961, 5385, 6103, 11883, 18309, 19805, 30515, 59415, 83647, 91545, 250941, 418235, 1254705, 1421999, 4265997, 7109995, 21329985]

約数ペア:

[(1, 21329985), (3, 7109995), (5, 4265997), (15, 1421999), (17, 1254705), (51, 418235), (85, 250941), (233, 91545), (255, 83647), (359, 59415), (699, 30515), (1077, 19805), (1165, 18309), (1795, 11883), (3495, 6103), (3961, 5385)]