21281216

素因数分解:

$2^6\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:122

約数の個数: 112

約数和(自身を含む): 50962560

約数和(自身を除く): 29681344

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 32, 37, 38, 43, 44, 64, 74, 76, 86, 88, 148, 152, 172, 176, 209, 296, 304, 344, 352, 407, 418, 473, 592, 608, 688, 703, 704, 814, 817, 836, 946, 1184, 1216, 1376, 1406, 1591, 1628, 1634, 1672, 1892, 2368, 2752, 2812, 3182, 3256, 3268, 3344, 3784, 5624, 6364, 6512, 6536, 6688, 7568, 7733, 8987, 11248, 12728, 13024, 13072, 13376, 15136, 15466, 17501, 17974, 22496, 25456, 26048, 26144, 30229, 30272, 30932, 35002, 35948, 44992, 50912, 52288, 60458, 61864, 70004, 71896, 101824, 120916, 123728, 140008, 143792, 241832, 247456, 280016, 287584, 332519, 483664, 494912, 560032, 575168, 665038, 967328, 1120064, 1330076, 1934656, 2660152, 5320304, 10640608, 21281216]

約数ペア:

[(1, 21281216), (2, 10640608), (4, 5320304), (8, 2660152), (11, 1934656), (16, 1330076), (19, 1120064), (22, 967328), (32, 665038), (37, 575168), (38, 560032), (43, 494912), (44, 483664), (64, 332519), (74, 287584), (76, 280016), (86, 247456), (88, 241832), (148, 143792), (152, 140008), (172, 123728), (176, 120916), (209, 101824), (296, 71896), (304, 70004), (344, 61864), (352, 60458), (407, 52288), (418, 50912), (473, 44992), (592, 35948), (608, 35002), (688, 30932), (703, 30272), (704, 30229), (814, 26144), (817, 26048), (836, 25456), (946, 22496), (1184, 17974), (1216, 17501), (1376, 15466), (1406, 15136), (1591, 13376), (1628, 13072), (1634, 13024), (1672, 12728), (1892, 11248), (2368, 8987), (2752, 7733), (2812, 7568), (3182, 6688), (3256, 6536), (3268, 6512), (3344, 6364), (3784, 5624)]