20004985

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{571}}^1$

素因数の和:614

約数の個数: 48

約数和(自身を含む): 32864832

約数和(自身を除く): 12859847

約数列:

[1, 5, 7, 11, 13, 35, 49, 55, 65, 77, 91, 143, 245, 385, 455, 539, 571, 637, 715, 1001, 2695, 2855, 3185, 3997, 5005, 6281, 7007, 7423, 19985, 27979, 31405, 35035, 37115, 43967, 51961, 81653, 139895, 219835, 259805, 307769, 363727, 408265, 571571, 1538845, 1818635, 2857855, 4000997, 20004985]

約数ペア:

[(1, 20004985), (5, 4000997), (7, 2857855), (11, 1818635), (13, 1538845), (35, 571571), (49, 408265), (55, 363727), (65, 307769), (77, 259805), (91, 219835), (143, 139895), (245, 81653), (385, 51961), (455, 43967), (539, 37115), (571, 35035), (637, 31405), (715, 27979), (1001, 19985), (2695, 7423), (2855, 7007), (3185, 6281), (3997, 5005)]