79998380

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{181}}^1$

素因数の和:256

約数の個数: 144

約数和(自身を含む): 219596832

約数和(自身を除く): 139598452

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, 181, 196, 205, 220, 245, 287, 308, 362, 385, 410, 451, 490, 539, 574, 724, 770, 820, 902, 905, 980, 1078, 1148, 1267, 1435, 1540, 1804, 1810, 1991, 2009, 2156, 2255, 2534, 2695, 2870, 3157, 3620, 3982, 4018, 4510, 5068, 5390, 5740, 6314, 6335, 7421, 7964, 8036, 8869, 9020, 9955, 10045, 10780, 12628, 12670, 13937, 14842, 15785, 17738, 19910, 20090, 22099, 25340, 27874, 29684, 31570, 35476, 37105, 39820, 40180, 44198, 44345, 51947, 55748, 63140, 69685, 74210, 81631, 88396, 88690, 97559, 103894, 110495, 139370, 148420, 163262, 177380, 195118, 207788, 220990, 259735, 278740, 326524, 363629, 390236, 408155, 441980, 487795, 519470, 571417, 727258, 816310, 975590, 1038940, 1142834, 1454516, 1632620, 1818145, 1951180, 2285668, 2857085, 3636290, 3999919, 5714170, 7272580, 7999838, 11428340, 15999676, 19999595, 39999190, 79998380]

約数ペア:

[(1, 79998380), (2, 39999190), (4, 19999595), (5, 15999676), (7, 11428340), (10, 7999838), (11, 7272580), (14, 5714170), (20, 3999919), (22, 3636290), (28, 2857085), (35, 2285668), (41, 1951180), (44, 1818145), (49, 1632620), (55, 1454516), (70, 1142834), (77, 1038940), (82, 975590), (98, 816310), (110, 727258), (140, 571417), (154, 519470), (164, 487795), (181, 441980), (196, 408155), (205, 390236), (220, 363629), (245, 326524), (287, 278740), (308, 259735), (362, 220990), (385, 207788), (410, 195118), (451, 177380), (490, 163262), (539, 148420), (574, 139370), (724, 110495), (770, 103894), (820, 97559), (902, 88690), (905, 88396), (980, 81631), (1078, 74210), (1148, 69685), (1267, 63140), (1435, 55748), (1540, 51947), (1804, 44345), (1810, 44198), (1991, 40180), (2009, 39820), (2156, 37105), (2255, 35476), (2534, 31570), (2695, 29684), (2870, 27874), (3157, 25340), (3620, 22099), (3982, 20090), (4018, 19910), (4510, 17738), (5068, 15785), (5390, 14842), (5740, 13937), (6314, 12670), (6335, 12628), (7421, 10780), (7964, 10045), (8036, 9955), (8869, 9020)]