1661578672

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{257689}}^1$

素因数の和:257741

約数の個数: 40

約数和(自身を含む): 3578798720

約数和(自身を除く): 1917220048

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3224, 6448, 257689, 515378, 1030756, 2061512, 3349957, 4123024, 6699914, 7988359, 13399828, 15976718, 26799656, 31953436, 53599312, 63906872, 103848667, 127813744, 207697334, 415394668, 830789336, 1661578672]

約数ペア:

[(1, 1661578672), (2, 830789336), (4, 415394668), (8, 207697334), (13, 127813744), (16, 103848667), (26, 63906872), (31, 53599312), (52, 31953436), (62, 26799656), (104, 15976718), (124, 13399828), (208, 7988359), (248, 6699914), (403, 4123024), (496, 3349957), (806, 2061512), (1612, 1030756), (3224, 515378), (6448, 257689)]