18739916

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1$

素因数の和:123

約数の個数: 72

約数和(自身を含む): 39713520

約数和(自身を除く): 20973604

約数列:

[1, 2, 4, 13, 17, 26, 29, 34, 43, 52, 58, 68, 86, 116, 172, 221, 289, 377, 442, 493, 559, 578, 731, 754, 884, 986, 1118, 1156, 1247, 1462, 1508, 1972, 2236, 2494, 2924, 3757, 4988, 6409, 7514, 8381, 9503, 12427, 12818, 15028, 16211, 16762, 19006, 21199, 24854, 25636, 32422, 33524, 38012, 42398, 49708, 64844, 84796, 108953, 161551, 217906, 275587, 323102, 360383, 435812, 551174, 646204, 720766, 1102348, 1441532, 4684979, 9369958, 18739916]

約数ペア:

[(1, 18739916), (2, 9369958), (4, 4684979), (13, 1441532), (17, 1102348), (26, 720766), (29, 646204), (34, 551174), (43, 435812), (52, 360383), (58, 323102), (68, 275587), (86, 217906), (116, 161551), (172, 108953), (221, 84796), (289, 64844), (377, 49708), (442, 42398), (493, 38012), (559, 33524), (578, 32422), (731, 25636), (754, 24854), (884, 21199), (986, 19006), (1118, 16762), (1156, 16211), (1247, 15028), (1462, 12818), (1508, 12427), (1972, 9503), (2236, 8381), (2494, 7514), (2924, 6409), (3757, 4988)]