257025340

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{223}}^1$

素因数の和:300

約数の個数: 144

約数和(自身を含む): 661118976

約数和(自身を除く): 404093636

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 31, 44, 52, 55, 62, 65, 110, 124, 130, 143, 155, 169, 220, 223, 260, 286, 310, 338, 341, 403, 446, 572, 620, 676, 682, 715, 806, 845, 892, 1115, 1364, 1430, 1612, 1690, 1705, 1859, 2015, 2230, 2453, 2860, 2899, 3380, 3410, 3718, 4030, 4433, 4460, 4906, 5239, 5798, 6820, 6913, 7436, 8060, 8866, 9295, 9812, 10478, 11596, 12265, 13826, 14495, 17732, 18590, 20956, 22165, 24530, 26195, 27652, 28990, 31889, 34565, 37180, 37687, 44330, 49060, 52390, 57629, 57980, 63778, 69130, 75374, 76043, 88660, 89869, 104780, 115258, 127556, 138260, 150748, 152086, 159445, 179738, 188435, 230516, 288145, 304172, 318890, 359476, 376870, 380215, 414557, 449345, 576290, 637780, 753740, 760430, 829114, 898690, 988559, 1152580, 1168297, 1520860, 1658228, 1797380, 1977118, 2072785, 2336594, 3954236, 4145570, 4673188, 4942795, 5841485, 8291140, 9885590, 11682970, 12851267, 19771180, 23365940, 25702534, 51405068, 64256335, 128512670, 257025340]

約数ペア:

[(1, 257025340), (2, 128512670), (4, 64256335), (5, 51405068), (10, 25702534), (11, 23365940), (13, 19771180), (20, 12851267), (22, 11682970), (26, 9885590), (31, 8291140), (44, 5841485), (52, 4942795), (55, 4673188), (62, 4145570), (65, 3954236), (110, 2336594), (124, 2072785), (130, 1977118), (143, 1797380), (155, 1658228), (169, 1520860), (220, 1168297), (223, 1152580), (260, 988559), (286, 898690), (310, 829114), (338, 760430), (341, 753740), (403, 637780), (446, 576290), (572, 449345), (620, 414557), (676, 380215), (682, 376870), (715, 359476), (806, 318890), (845, 304172), (892, 288145), (1115, 230516), (1364, 188435), (1430, 179738), (1612, 159445), (1690, 152086), (1705, 150748), (1859, 138260), (2015, 127556), (2230, 115258), (2453, 104780), (2860, 89869), (2899, 88660), (3380, 76043), (3410, 75374), (3718, 69130), (4030, 63778), (4433, 57980), (4460, 57629), (4906, 52390), (5239, 49060), (5798, 44330), (6820, 37687), (6913, 37180), (7436, 34565), (8060, 31889), (8866, 28990), (9295, 27652), (9812, 26195), (10478, 24530), (11596, 22165), (12265, 20956), (13826, 18590), (14495, 17732)]