19720365

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{293}}^1\times {\mathrm{641}}^1$

素因数の和:949

約数の個数: 32

約数和(自身を含む): 36239616

約数和(自身を除く): 16519251

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 293, 641, 879, 1465, 1923, 2051, 3205, 4395, 4487, 6153, 9615, 10255, 13461, 22435, 30765, 67305, 187813, 563439, 939065, 1314691, 2817195, 3944073, 6573455, 19720365]

約数ペア:

[(1, 19720365), (3, 6573455), (5, 3944073), (7, 2817195), (15, 1314691), (21, 939065), (35, 563439), (105, 187813), (293, 67305), (641, 30765), (879, 22435), (1465, 13461), (1923, 10255), (2051, 9615), (3205, 6153), (4395, 4487)]