19717984

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:204

約数の個数: 96

約数和(自身を含む): 47416320

約数和(自身を除く): 27698336

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 31, 32, 44, 52, 62, 88, 104, 124, 139, 143, 176, 208, 248, 278, 286, 341, 352, 403, 416, 496, 556, 572, 682, 806, 992, 1112, 1144, 1364, 1529, 1612, 1807, 2224, 2288, 2728, 3058, 3224, 3614, 4309, 4433, 4448, 4576, 5456, 6116, 6448, 7228, 8618, 8866, 10912, 12232, 12896, 14456, 17236, 17732, 19877, 24464, 28912, 34472, 35464, 39754, 47399, 48928, 56017, 57824, 68944, 70928, 79508, 94798, 112034, 137888, 141856, 159016, 189596, 224068, 318032, 379192, 448136, 616187, 636064, 758384, 896272, 1232374, 1516768, 1792544, 2464748, 4929496, 9858992, 19717984]

約数ペア:

[(1, 19717984), (2, 9858992), (4, 4929496), (8, 2464748), (11, 1792544), (13, 1516768), (16, 1232374), (22, 896272), (26, 758384), (31, 636064), (32, 616187), (44, 448136), (52, 379192), (62, 318032), (88, 224068), (104, 189596), (124, 159016), (139, 141856), (143, 137888), (176, 112034), (208, 94798), (248, 79508), (278, 70928), (286, 68944), (341, 57824), (352, 56017), (403, 48928), (416, 47399), (496, 39754), (556, 35464), (572, 34472), (682, 28912), (806, 24464), (992, 19877), (1112, 17732), (1144, 17236), (1364, 14456), (1529, 12896), (1612, 12232), (1807, 10912), (2224, 8866), (2288, 8618), (2728, 7228), (3058, 6448), (3224, 6116), (3614, 5456), (4309, 4576), (4433, 4448)]