201915

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{641}}^1$

素因数の和:659

約数の個数: 24

約数和(自身を含む): 400608

約数和(自身を除く): 198693

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 641, 1923, 3205, 4487, 5769, 9615, 13461, 22435, 28845, 40383, 67305, 201915]

約数ペア:

[(1, 201915), (3, 67305), (5, 40383), (7, 28845), (9, 22435), (15, 13461), (21, 9615), (35, 5769), (45, 4487), (63, 3205), (105, 1923), (315, 641)]