21213712

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{1291}}^1$

素因数の和:1391

約数の個数: 40

約数和(自身を含む): 44858240

約数和(自身を除く): 23644528

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 79, 104, 158, 208, 316, 632, 1027, 1264, 1291, 2054, 2582, 4108, 5164, 8216, 10328, 16432, 16783, 20656, 33566, 67132, 101989, 134264, 203978, 268528, 407956, 815912, 1325857, 1631824, 2651714, 5303428, 10606856, 21213712]

約数ペア:

[(1, 21213712), (2, 10606856), (4, 5303428), (8, 2651714), (13, 1631824), (16, 1325857), (26, 815912), (52, 407956), (79, 268528), (104, 203978), (158, 134264), (208, 101989), (316, 67132), (632, 33566), (1027, 20656), (1264, 16783), (1291, 16432), (2054, 10328), (2582, 8216), (4108, 5164)]