261129820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{97}}^1$

素因数の和:228

約数の個数: 144

約数和(自身を含む): 670051872

約数和(自身を除く): 408922052

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 67, 70, 82, 97, 98, 134, 140, 164, 194, 196, 205, 245, 268, 287, 335, 388, 410, 469, 485, 490, 574, 670, 679, 820, 938, 970, 980, 1148, 1340, 1358, 1435, 1876, 1940, 2009, 2345, 2716, 2747, 2870, 3283, 3395, 3977, 4018, 4690, 4753, 5494, 5740, 6499, 6566, 6790, 7954, 8036, 9380, 9506, 10045, 10988, 12998, 13132, 13580, 13735, 15908, 16415, 19012, 19229, 19885, 20090, 23765, 25996, 27470, 27839, 32495, 32830, 38458, 39770, 40180, 45493, 47530, 54940, 55678, 64990, 65660, 76916, 79540, 90986, 95060, 96145, 111356, 129980, 134603, 139195, 181972, 192290, 194873, 227465, 266459, 269206, 278390, 318451, 384580, 389746, 454930, 532918, 538412, 556780, 636902, 673015, 779492, 909860, 974365, 1065836, 1273804, 1332295, 1346030, 1592255, 1865213, 1948730, 2664590, 2692060, 3184510, 3730426, 3897460, 5329180, 6369020, 7460852, 9326065, 13056491, 18652130, 26112982, 37304260, 52225964, 65282455, 130564910, 261129820]

約数ペア:

[(1, 261129820), (2, 130564910), (4, 65282455), (5, 52225964), (7, 37304260), (10, 26112982), (14, 18652130), (20, 13056491), (28, 9326065), (35, 7460852), (41, 6369020), (49, 5329180), (67, 3897460), (70, 3730426), (82, 3184510), (97, 2692060), (98, 2664590), (134, 1948730), (140, 1865213), (164, 1592255), (194, 1346030), (196, 1332295), (205, 1273804), (245, 1065836), (268, 974365), (287, 909860), (335, 779492), (388, 673015), (410, 636902), (469, 556780), (485, 538412), (490, 532918), (574, 454930), (670, 389746), (679, 384580), (820, 318451), (938, 278390), (970, 269206), (980, 266459), (1148, 227465), (1340, 194873), (1358, 192290), (1435, 181972), (1876, 139195), (1940, 134603), (2009, 129980), (2345, 111356), (2716, 96145), (2747, 95060), (2870, 90986), (3283, 79540), (3395, 76916), (3977, 65660), (4018, 64990), (4690, 55678), (4753, 54940), (5494, 47530), (5740, 45493), (6499, 40180), (6566, 39770), (6790, 38458), (7954, 32830), (8036, 32495), (9380, 27839), (9506, 27470), (10045, 25996), (10988, 23765), (12998, 20090), (13132, 19885), (13580, 19229), (13735, 19012), (15908, 16415)]