20976776

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:294

約数の個数: 48

約数和(自身を含む): 42955440

約数和(自身を除く): 21978664

約数列:

[1, 2, 4, 8, 17, 34, 43, 68, 86, 136, 172, 211, 289, 344, 422, 578, 731, 844, 1156, 1462, 1688, 2312, 2924, 3587, 5848, 7174, 9073, 12427, 14348, 18146, 24854, 28696, 36292, 49708, 60979, 72584, 99416, 121958, 154241, 243916, 308482, 487832, 616964, 1233928, 2622097, 5244194, 10488388, 20976776]

約数ペア:

[(1, 20976776), (2, 10488388), (4, 5244194), (8, 2622097), (17, 1233928), (34, 616964), (43, 487832), (68, 308482), (86, 243916), (136, 154241), (172, 121958), (211, 99416), (289, 72584), (344, 60979), (422, 49708), (578, 36292), (731, 28696), (844, 24854), (1156, 18146), (1462, 14348), (1688, 12427), (2312, 9073), (2924, 7174), (3587, 5848)]