1287761720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{359}}^1\times {\mathrm{557}}^1$

素因数の和:957

約数の個数: 128

約数和(自身を含む): 3471206400

約数和(自身を除く): 2183444680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 359, 460, 557, 644, 718, 805, 920, 1114, 1288, 1436, 1610, 1795, 2228, 2513, 2785, 2872, 3220, 3590, 3899, 4456, 5026, 5570, 6440, 7180, 7798, 8257, 10052, 11140, 12565, 12811, 14360, 15596, 16514, 19495, 20104, 22280, 25130, 25622, 31192, 33028, 38990, 41285, 50260, 51244, 57799, 64055, 66056, 77980, 82570, 89677, 100520, 102488, 115598, 128110, 155960, 165140, 179354, 199963, 231196, 256220, 288995, 330280, 358708, 399926, 448385, 462392, 512440, 577990, 717416, 799852, 896770, 999815, 1155980, 1399741, 1599704, 1793540, 1999630, 2311960, 2799482, 3587080, 3999260, 4599149, 5598964, 6998705, 7998520, 9198298, 11197928, 13997410, 18396596, 22995745, 27994820, 32194043, 36793192, 45991490, 55989640, 64388086, 91982980, 128776172, 160970215, 183965960, 257552344, 321940430, 643880860, 1287761720]

約数ペア:

[(1, 1287761720), (2, 643880860), (4, 321940430), (5, 257552344), (7, 183965960), (8, 160970215), (10, 128776172), (14, 91982980), (20, 64388086), (23, 55989640), (28, 45991490), (35, 36793192), (40, 32194043), (46, 27994820), (56, 22995745), (70, 18396596), (92, 13997410), (115, 11197928), (140, 9198298), (161, 7998520), (184, 6998705), (230, 5598964), (280, 4599149), (322, 3999260), (359, 3587080), (460, 2799482), (557, 2311960), (644, 1999630), (718, 1793540), (805, 1599704), (920, 1399741), (1114, 1155980), (1288, 999815), (1436, 896770), (1610, 799852), (1795, 717416), (2228, 577990), (2513, 512440), (2785, 462392), (2872, 448385), (3220, 399926), (3590, 358708), (3899, 330280), (4456, 288995), (5026, 256220), (5570, 231196), (6440, 199963), (7180, 179354), (7798, 165140), (8257, 155960), (10052, 128110), (11140, 115598), (12565, 102488), (12811, 100520), (14360, 89677), (15596, 82570), (16514, 77980), (19495, 66056), (20104, 64055), (22280, 57799), (25130, 51244), (25622, 50260), (31192, 41285), (33028, 38990)]