20398976

素因数分解:

$2^7\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{41}}^1$

素因数の和:104

約数の個数: 96

約数和(自身を含む): 47038320

約数和(自身を除く): 26639344

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 32, 41, 46, 52, 64, 82, 92, 104, 128, 164, 169, 184, 208, 299, 328, 338, 368, 416, 533, 598, 656, 676, 736, 832, 943, 1066, 1196, 1312, 1352, 1472, 1664, 1886, 2132, 2392, 2624, 2704, 2944, 3772, 3887, 4264, 4784, 5248, 5408, 6929, 7544, 7774, 8528, 9568, 10816, 12259, 13858, 15088, 15548, 17056, 19136, 21632, 24518, 27716, 30176, 31096, 34112, 38272, 49036, 55432, 60352, 62192, 68224, 98072, 110864, 120704, 124384, 159367, 196144, 221728, 248768, 318734, 392288, 443456, 497536, 637468, 784576, 886912, 1274936, 1569152, 2549872, 5099744, 10199488, 20398976]

約数ペア:

[(1, 20398976), (2, 10199488), (4, 5099744), (8, 2549872), (13, 1569152), (16, 1274936), (23, 886912), (26, 784576), (32, 637468), (41, 497536), (46, 443456), (52, 392288), (64, 318734), (82, 248768), (92, 221728), (104, 196144), (128, 159367), (164, 124384), (169, 120704), (184, 110864), (208, 98072), (299, 68224), (328, 62192), (338, 60352), (368, 55432), (416, 49036), (533, 38272), (598, 34112), (656, 31096), (676, 30176), (736, 27716), (832, 24518), (943, 21632), (1066, 19136), (1196, 17056), (1312, 15548), (1352, 15088), (1472, 13858), (1664, 12259), (1886, 10816), (2132, 9568), (2392, 8528), (2624, 7774), (2704, 7544), (2944, 6929), (3772, 5408), (3887, 5248), (4264, 4784)]