21008015

素因数分解:

$5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{4513}}^1$

素因数の和:4551

約数の個数: 24

約数和(自身を含む): 30875760

約数和(自身を除く): 9867745

約数列:

[1, 5, 7, 19, 35, 49, 95, 133, 245, 665, 931, 4513, 4655, 22565, 31591, 85747, 157955, 221137, 428735, 600229, 1105685, 3001145, 4201603, 21008015]

約数ペア:

[(1, 21008015), (5, 4201603), (7, 3001145), (19, 1105685), (35, 600229), (49, 428735), (95, 221137), (133, 157955), (245, 85747), (665, 31591), (931, 22565), (4513, 4655)]