21111008

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{257}}^1$

素因数の和:435

約数の個数: 48

約数和(自身を含む): 44470944

約数和(自身を除く): 23359936

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 68, 136, 151, 257, 272, 302, 514, 544, 604, 1028, 1208, 2056, 2416, 2567, 4112, 4369, 4832, 5134, 8224, 8738, 10268, 17476, 20536, 34952, 38807, 41072, 69904, 77614, 82144, 139808, 155228, 310456, 620912, 659719, 1241824, 1319438, 2638876, 5277752, 10555504, 21111008]

約数ペア:

[(1, 21111008), (2, 10555504), (4, 5277752), (8, 2638876), (16, 1319438), (17, 1241824), (32, 659719), (34, 620912), (68, 310456), (136, 155228), (151, 139808), (257, 82144), (272, 77614), (302, 69904), (514, 41072), (544, 38807), (604, 34952), (1028, 20536), (1208, 17476), (2056, 10268), (2416, 8738), (2567, 8224), (4112, 5134), (4369, 4832)]