21989656

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{317}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 48081600

約数和(自身を除く): 26091944

約数列:

[1, 2, 4, 8, 13, 23, 26, 29, 46, 52, 58, 92, 104, 116, 184, 232, 299, 317, 377, 598, 634, 667, 754, 1196, 1268, 1334, 1508, 2392, 2536, 2668, 3016, 4121, 5336, 7291, 8242, 8671, 9193, 14582, 16484, 17342, 18386, 29164, 32968, 34684, 36772, 58328, 69368, 73544, 94783, 119509, 189566, 211439, 239018, 379132, 422878, 478036, 758264, 845756, 956072, 1691512, 2748707, 5497414, 10994828, 21989656]

約数ペア:

[(1, 21989656), (2, 10994828), (4, 5497414), (8, 2748707), (13, 1691512), (23, 956072), (26, 845756), (29, 758264), (46, 478036), (52, 422878), (58, 379132), (92, 239018), (104, 211439), (116, 189566), (184, 119509), (232, 94783), (299, 73544), (317, 69368), (377, 58328), (598, 36772), (634, 34684), (667, 32968), (754, 29164), (1196, 18386), (1268, 17342), (1334, 16484), (1508, 14582), (2392, 9193), (2536, 8671), (2668, 8242), (3016, 7291), (4121, 5336)]