21420015

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1321}}^1$

素因数の和:1399

約数の個数: 32

約数和(自身を含む): 36550656

約数和(自身を除く): 15130641

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1321, 3243, 3963, 5405, 6605, 16215, 19815, 30383, 62087, 91149, 151915, 186261, 310435, 455745, 931305, 1428001, 4284003, 7140005, 21420015]

約数ペア:

[(1, 21420015), (3, 7140005), (5, 4284003), (15, 1428001), (23, 931305), (47, 455745), (69, 310435), (115, 186261), (141, 151915), (235, 91149), (345, 62087), (705, 30383), (1081, 19815), (1321, 16215), (3243, 6605), (3963, 5405)]