21337720

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{31379}}^1$

素因数の和:31407

約数の個数: 32

約数和(自身を含む): 50835600

約数和(自身を除く): 29497880

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 31379, 62758, 125516, 156895, 251032, 313790, 533443, 627580, 1066886, 1255160, 2133772, 2667215, 4267544, 5334430, 10668860, 21337720]

約数ペア:

[(1, 21337720), (2, 10668860), (4, 5334430), (5, 4267544), (8, 2667215), (10, 2133772), (17, 1255160), (20, 1066886), (34, 627580), (40, 533443), (68, 313790), (85, 251032), (136, 156895), (170, 125516), (340, 62758), (680, 31379)]