128721409

素因数分解:

${\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{419}}^1$

素因数の和:517

約数の個数: 24

約数和(自身を含む): 145938240

約数和(自身を除く): 17216831

約数列:

[1, 19, 23, 37, 361, 419, 437, 703, 851, 7961, 8303, 9637, 13357, 15503, 16169, 151259, 183103, 294557, 307211, 356569, 3478957, 5596583, 6774811, 128721409]

約数ペア:

[(1, 128721409), (19, 6774811), (23, 5596583), (37, 3478957), (361, 356569), (419, 307211), (437, 294557), (703, 183103), (851, 151259), (7961, 16169), (8303, 15503), (9637, 13357)]