256978540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{877}}^1$

素因数の和:936

約数の個数: 144

約数和(自身を含む): 706249152

約数和(自身を除く): 449270612

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 23, 26, 28, 35, 46, 49, 52, 65, 70, 91, 92, 98, 115, 130, 140, 161, 182, 196, 230, 245, 260, 299, 322, 364, 455, 460, 490, 598, 637, 644, 805, 877, 910, 980, 1127, 1196, 1274, 1495, 1610, 1754, 1820, 2093, 2254, 2548, 2990, 3185, 3220, 3508, 4186, 4385, 4508, 5635, 5980, 6139, 6370, 8372, 8770, 10465, 11270, 11401, 12278, 12740, 14651, 17540, 20171, 20930, 22540, 22802, 24556, 29302, 30695, 40342, 41860, 42973, 45604, 57005, 58604, 61390, 73255, 79807, 80684, 85946, 100855, 114010, 122780, 141197, 146510, 159614, 171892, 201710, 214865, 228020, 262223, 282394, 293020, 319228, 399035, 403420, 429730, 524446, 558649, 564788, 705985, 798070, 859460, 988379, 1048892, 1117298, 1311115, 1411970, 1596140, 1835561, 1976758, 2234596, 2622230, 2793245, 2823940, 3671122, 3953516, 4941895, 5244460, 5586490, 7342244, 9177805, 9883790, 11172980, 12848927, 18355610, 19767580, 25697854, 36711220, 51395708, 64244635, 128489270, 256978540]

約数ペア:

[(1, 256978540), (2, 128489270), (4, 64244635), (5, 51395708), (7, 36711220), (10, 25697854), (13, 19767580), (14, 18355610), (20, 12848927), (23, 11172980), (26, 9883790), (28, 9177805), (35, 7342244), (46, 5586490), (49, 5244460), (52, 4941895), (65, 3953516), (70, 3671122), (91, 2823940), (92, 2793245), (98, 2622230), (115, 2234596), (130, 1976758), (140, 1835561), (161, 1596140), (182, 1411970), (196, 1311115), (230, 1117298), (245, 1048892), (260, 988379), (299, 859460), (322, 798070), (364, 705985), (455, 564788), (460, 558649), (490, 524446), (598, 429730), (637, 403420), (644, 399035), (805, 319228), (877, 293020), (910, 282394), (980, 262223), (1127, 228020), (1196, 214865), (1274, 201710), (1495, 171892), (1610, 159614), (1754, 146510), (1820, 141197), (2093, 122780), (2254, 114010), (2548, 100855), (2990, 85946), (3185, 80684), (3220, 79807), (3508, 73255), (4186, 61390), (4385, 58604), (4508, 57005), (5635, 45604), (5980, 42973), (6139, 41860), (6370, 40342), (8372, 30695), (8770, 29302), (10465, 24556), (11270, 22802), (11401, 22540), (12278, 20930), (12740, 20171), (14651, 17540)]