20847304

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 42439680

約数和(自身を除く): 21592376

約数列:

[1, 2, 4, 8, 17, 34, 68, 71, 127, 136, 142, 254, 284, 289, 508, 568, 578, 1016, 1156, 1207, 2159, 2312, 2414, 4318, 4828, 8636, 9017, 9656, 17272, 18034, 20519, 36068, 36703, 41038, 72136, 73406, 82076, 146812, 153289, 164152, 293624, 306578, 613156, 1226312, 2605913, 5211826, 10423652, 20847304]

約数ペア:

[(1, 20847304), (2, 10423652), (4, 5211826), (8, 2605913), (17, 1226312), (34, 613156), (68, 306578), (71, 293624), (127, 164152), (136, 153289), (142, 146812), (254, 82076), (284, 73406), (289, 72136), (508, 41038), (568, 36703), (578, 36068), (1016, 20519), (1156, 18034), (1207, 17272), (2159, 9656), (2312, 9017), (2414, 8636), (4318, 4828)]