21255220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{23}}^2\times {\mathrm{41}}^1$

素因数の和:110

約数の個数: 108

約数和(自身を含む): 55603044

約数和(自身を除く): 34347824

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 41, 46, 49, 70, 82, 92, 98, 115, 140, 161, 164, 196, 205, 230, 245, 287, 322, 410, 460, 490, 529, 574, 644, 805, 820, 943, 980, 1058, 1127, 1148, 1435, 1610, 1886, 2009, 2116, 2254, 2645, 2870, 3220, 3703, 3772, 4018, 4508, 4715, 5290, 5635, 5740, 6601, 7406, 8036, 9430, 10045, 10580, 11270, 13202, 14812, 18515, 18860, 20090, 21689, 22540, 25921, 26404, 33005, 37030, 40180, 43378, 46207, 51842, 66010, 74060, 86756, 92414, 103684, 108445, 129605, 132020, 151823, 184828, 216890, 231035, 259210, 303646, 433780, 462070, 518420, 607292, 759115, 924140, 1062761, 1518230, 2125522, 3036460, 4251044, 5313805, 10627610, 21255220]

約数ペア:

[(1, 21255220), (2, 10627610), (4, 5313805), (5, 4251044), (7, 3036460), (10, 2125522), (14, 1518230), (20, 1062761), (23, 924140), (28, 759115), (35, 607292), (41, 518420), (46, 462070), (49, 433780), (70, 303646), (82, 259210), (92, 231035), (98, 216890), (115, 184828), (140, 151823), (161, 132020), (164, 129605), (196, 108445), (205, 103684), (230, 92414), (245, 86756), (287, 74060), (322, 66010), (410, 51842), (460, 46207), (490, 43378), (529, 40180), (574, 37030), (644, 33005), (805, 26404), (820, 25921), (943, 22540), (980, 21689), (1058, 20090), (1127, 18860), (1148, 18515), (1435, 14812), (1610, 13202), (1886, 11270), (2009, 10580), (2116, 10045), (2254, 9430), (2645, 8036), (2870, 7406), (3220, 6601), (3703, 5740), (3772, 5635), (4018, 5290), (4508, 4715)]