19918288

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 80

約数和(自身を含む): 45372096

約数和(自身を除く): 25453808

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 43, 52, 68, 86, 104, 131, 136, 172, 208, 221, 262, 272, 344, 442, 524, 559, 688, 731, 884, 1048, 1118, 1462, 1703, 1768, 2096, 2227, 2236, 2924, 3406, 3536, 4454, 4472, 5633, 5848, 6812, 8908, 8944, 9503, 11266, 11696, 13624, 17816, 19006, 22532, 27248, 28951, 35632, 38012, 45064, 57902, 73229, 76024, 90128, 95761, 115804, 146458, 152048, 191522, 231608, 292916, 383044, 463216, 585832, 766088, 1171664, 1244893, 1532176, 2489786, 4979572, 9959144, 19918288]

約数ペア:

[(1, 19918288), (2, 9959144), (4, 4979572), (8, 2489786), (13, 1532176), (16, 1244893), (17, 1171664), (26, 766088), (34, 585832), (43, 463216), (52, 383044), (68, 292916), (86, 231608), (104, 191522), (131, 152048), (136, 146458), (172, 115804), (208, 95761), (221, 90128), (262, 76024), (272, 73229), (344, 57902), (442, 45064), (524, 38012), (559, 35632), (688, 28951), (731, 27248), (884, 22532), (1048, 19006), (1118, 17816), (1462, 13624), (1703, 11696), (1768, 11266), (2096, 9503), (2227, 8944), (2236, 8908), (2924, 6812), (3406, 5848), (3536, 5633), (4454, 4472)]