21205514

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{239}}^1$

素因数の和:398

約数の個数: 32

約数和(自身を含む): 36115200

約数和(自身を除く): 14909686

約数列:

[1, 2, 11, 22, 37, 74, 109, 218, 239, 407, 478, 814, 1199, 2398, 2629, 4033, 5258, 8066, 8843, 17686, 26051, 44363, 52102, 88726, 97273, 194546, 286561, 573122, 963887, 1927774, 10602757, 21205514]

約数ペア:

[(1, 21205514), (2, 10602757), (11, 1927774), (22, 963887), (37, 573122), (74, 286561), (109, 194546), (218, 97273), (239, 88726), (407, 52102), (478, 44363), (814, 26051), (1199, 17686), (2398, 8843), (2629, 8066), (4033, 5258)]