19905306505

素因数分解:

$5^1\times 7^2\times {\mathrm{197}}^1\times {\mathrm{317}}^1\times {\mathrm{1301}}^1$

素因数の和:1834

約数の個数: 48

約数和(自身を含む): 28036861776

約数和(自身を除く): 8131555271

約数列:

[1, 5, 7, 35, 49, 197, 245, 317, 985, 1301, 1379, 1585, 2219, 6505, 6895, 9107, 9653, 11095, 15533, 45535, 48265, 62449, 63749, 77665, 256297, 312245, 318745, 412417, 437143, 1281485, 1794079, 2062085, 2185715, 2886919, 3060001, 8970395, 12558553, 14434595, 15300005, 20208433, 62792765, 81246149, 101042165, 406230745, 568723043, 2843615215, 3981061301, 19905306505]

約数ペア:

[(1, 19905306505), (5, 3981061301), (7, 2843615215), (35, 568723043), (49, 406230745), (197, 101042165), (245, 81246149), (317, 62792765), (985, 20208433), (1301, 15300005), (1379, 14434595), (1585, 12558553), (2219, 8970395), (6505, 3060001), (6895, 2886919), (9107, 2185715), (9653, 2062085), (11095, 1794079), (15533, 1281485), (45535, 437143), (48265, 412417), (62449, 318745), (63749, 312245), (77665, 256297)]