21219915

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61507}}^1$

素因数の和:61538

約数の個数: 16

約数和(自身を含む): 35428608

約数和(自身を除く): 14208693

約数列:

[1, 3, 5, 15, 23, 69, 115, 345, 61507, 184521, 307535, 922605, 1414661, 4243983, 7073305, 21219915]

約数ペア:

[(1, 21219915), (3, 7073305), (5, 4243983), (15, 1414661), (23, 922605), (69, 307535), (115, 184521), (345, 61507)]