21000251965

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{367}}^1\times {\mathrm{148627}}^1$

素因数の和:149017

約数の個数: 32

約数和(自身を含む): 31504379904

約数和(自身を除く): 10504127939

約数列:

[1, 5, 7, 11, 35, 55, 77, 367, 385, 1835, 2569, 4037, 12845, 20185, 28259, 141295, 148627, 743135, 1040389, 1634897, 5201945, 8174485, 11444279, 54546109, 57221395, 272730545, 381822763, 600007199, 1909113815, 3000035995, 4200050393, 21000251965]

約数ペア:

[(1, 21000251965), (5, 4200050393), (7, 3000035995), (11, 1909113815), (35, 600007199), (55, 381822763), (77, 272730545), (367, 57221395), (385, 54546109), (1835, 11444279), (2569, 8174485), (4037, 5201945), (12845, 1634897), (20185, 1040389), (28259, 743135), (141295, 148627)]