21513585

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{353}}^1$

素因数の和:617

約数の個数: 32

約数和(自身を含む): 36702720

約数和(自身を除く): 15189135

約数列:

[1, 3, 5, 15, 17, 51, 85, 239, 255, 353, 717, 1059, 1195, 1765, 3585, 4063, 5295, 6001, 12189, 18003, 20315, 30005, 60945, 84367, 90015, 253101, 421835, 1265505, 1434239, 4302717, 7171195, 21513585]

約数ペア:

[(1, 21513585), (3, 7171195), (5, 4302717), (15, 1434239), (17, 1265505), (51, 421835), (85, 253101), (239, 90015), (255, 84367), (353, 60945), (717, 30005), (1059, 20315), (1195, 18003), (1765, 12189), (3585, 6001), (4063, 5295)]