21165952

素因数分解:

$2^7\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 45606240

約数和(自身を除く): 24440288

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 64, 68, 71, 128, 136, 137, 142, 272, 274, 284, 544, 548, 568, 1088, 1096, 1136, 1207, 2176, 2192, 2272, 2329, 2414, 4384, 4544, 4658, 4828, 8768, 9088, 9316, 9656, 9727, 17536, 18632, 19312, 19454, 37264, 38624, 38908, 74528, 77248, 77816, 149056, 154496, 155632, 165359, 298112, 311264, 330718, 622528, 661436, 1245056, 1322872, 2645744, 5291488, 10582976, 21165952]

約数ペア:

[(1, 21165952), (2, 10582976), (4, 5291488), (8, 2645744), (16, 1322872), (17, 1245056), (32, 661436), (34, 622528), (64, 330718), (68, 311264), (71, 298112), (128, 165359), (136, 155632), (137, 154496), (142, 149056), (272, 77816), (274, 77248), (284, 74528), (544, 38908), (548, 38624), (568, 37264), (1088, 19454), (1096, 19312), (1136, 18632), (1207, 17536), (2176, 9727), (2192, 9656), (2272, 9316), (2329, 9088), (2414, 8768), (4384, 4828), (4544, 4658)]