18321784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{241}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 40249440

約数和(自身を除く): 21927656

約数列:

[1, 2, 4, 8, 13, 17, 26, 34, 43, 52, 68, 86, 104, 136, 172, 221, 241, 344, 442, 482, 559, 731, 884, 964, 1118, 1462, 1768, 1928, 2236, 2924, 3133, 4097, 4472, 5848, 6266, 8194, 9503, 10363, 12532, 16388, 19006, 20726, 25064, 32776, 38012, 41452, 53261, 76024, 82904, 106522, 134719, 176171, 213044, 269438, 352342, 426088, 538876, 704684, 1077752, 1409368, 2290223, 4580446, 9160892, 18321784]

約数ペア:

[(1, 18321784), (2, 9160892), (4, 4580446), (8, 2290223), (13, 1409368), (17, 1077752), (26, 704684), (34, 538876), (43, 426088), (52, 352342), (68, 269438), (86, 213044), (104, 176171), (136, 134719), (172, 106522), (221, 82904), (241, 76024), (344, 53261), (442, 41452), (482, 38012), (559, 32776), (731, 25064), (884, 20726), (964, 19006), (1118, 16388), (1462, 12532), (1768, 10363), (1928, 9503), (2236, 8194), (2924, 6266), (3133, 5848), (4097, 4472)]