278889380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{631}}^1$

素因数の和:706

約数の個数: 144

約数和(自身を含む): 762556032

約数和(自身を除く): 483666652

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 41, 44, 49, 55, 70, 77, 82, 98, 110, 140, 154, 164, 196, 205, 220, 245, 287, 308, 385, 410, 451, 490, 539, 574, 631, 770, 820, 902, 980, 1078, 1148, 1262, 1435, 1540, 1804, 2009, 2156, 2255, 2524, 2695, 2870, 3155, 3157, 4018, 4417, 4510, 5390, 5740, 6310, 6314, 6941, 8036, 8834, 9020, 10045, 10780, 12620, 12628, 13882, 15785, 17668, 20090, 22085, 22099, 25871, 27764, 30919, 31570, 34705, 40180, 44170, 44198, 48587, 51742, 61838, 63140, 69410, 88340, 88396, 97174, 103484, 110495, 123676, 129355, 138820, 154595, 181097, 194348, 220990, 242935, 258710, 284581, 309190, 340109, 362194, 441980, 485870, 517420, 569162, 618380, 680218, 724388, 905485, 971740, 1138324, 1267679, 1360436, 1422905, 1700545, 1810970, 1992067, 2535358, 2845810, 3401090, 3621940, 3984134, 5070716, 5691620, 6338395, 6802180, 7968268, 9960335, 12676790, 13944469, 19920670, 25353580, 27888938, 39841340, 55777876, 69722345, 139444690, 278889380]

約数ペア:

[(1, 278889380), (2, 139444690), (4, 69722345), (5, 55777876), (7, 39841340), (10, 27888938), (11, 25353580), (14, 19920670), (20, 13944469), (22, 12676790), (28, 9960335), (35, 7968268), (41, 6802180), (44, 6338395), (49, 5691620), (55, 5070716), (70, 3984134), (77, 3621940), (82, 3401090), (98, 2845810), (110, 2535358), (140, 1992067), (154, 1810970), (164, 1700545), (196, 1422905), (205, 1360436), (220, 1267679), (245, 1138324), (287, 971740), (308, 905485), (385, 724388), (410, 680218), (451, 618380), (490, 569162), (539, 517420), (574, 485870), (631, 441980), (770, 362194), (820, 340109), (902, 309190), (980, 284581), (1078, 258710), (1148, 242935), (1262, 220990), (1435, 194348), (1540, 181097), (1804, 154595), (2009, 138820), (2156, 129355), (2255, 123676), (2524, 110495), (2695, 103484), (2870, 97174), (3155, 88396), (3157, 88340), (4018, 69410), (4417, 63140), (4510, 61838), (5390, 51742), (5740, 48587), (6310, 44198), (6314, 44170), (6941, 40180), (8036, 34705), (8834, 31570), (9020, 30919), (10045, 27764), (10780, 25871), (12620, 22099), (12628, 22085), (13882, 20090), (15785, 17668)]