20028008

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:139

約数の個数: 128

約数和(自身を含む): 52496640

約数和(自身を除く): 32468632

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 41, 44, 52, 56, 61, 77, 82, 88, 91, 104, 122, 143, 154, 164, 182, 244, 286, 287, 308, 328, 364, 427, 451, 488, 533, 572, 574, 616, 671, 728, 793, 854, 902, 1001, 1066, 1144, 1148, 1342, 1586, 1708, 1804, 2002, 2132, 2296, 2501, 2684, 3157, 3172, 3416, 3608, 3731, 4004, 4264, 4697, 5002, 5368, 5551, 5863, 6314, 6344, 7462, 8008, 8723, 9394, 10004, 11102, 11726, 12628, 14924, 17446, 17507, 18788, 20008, 22204, 23452, 25256, 27511, 29848, 32513, 34892, 35014, 37576, 41041, 44408, 46904, 55022, 61061, 65026, 69784, 70028, 82082, 110044, 122122, 130052, 140056, 164164, 192577, 220088, 227591, 244244, 260104, 328328, 357643, 385154, 455182, 488488, 715286, 770308, 910364, 1430572, 1540616, 1820728, 2503501, 2861144, 5007002, 10014004, 20028008]

約数ペア:

[(1, 20028008), (2, 10014004), (4, 5007002), (7, 2861144), (8, 2503501), (11, 1820728), (13, 1540616), (14, 1430572), (22, 910364), (26, 770308), (28, 715286), (41, 488488), (44, 455182), (52, 385154), (56, 357643), (61, 328328), (77, 260104), (82, 244244), (88, 227591), (91, 220088), (104, 192577), (122, 164164), (143, 140056), (154, 130052), (164, 122122), (182, 110044), (244, 82082), (286, 70028), (287, 69784), (308, 65026), (328, 61061), (364, 55022), (427, 46904), (451, 44408), (488, 41041), (533, 37576), (572, 35014), (574, 34892), (616, 32513), (671, 29848), (728, 27511), (793, 25256), (854, 23452), (902, 22204), (1001, 20008), (1066, 18788), (1144, 17507), (1148, 17446), (1342, 14924), (1586, 12628), (1708, 11726), (1804, 11102), (2002, 10004), (2132, 9394), (2296, 8723), (2501, 8008), (2684, 7462), (3157, 6344), (3172, 6314), (3416, 5863), (3608, 5551), (3731, 5368), (4004, 5002), (4264, 4697)]