20789181

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1$

素因数の和:143

約数の個数: 72

約数和(自身を含む): 38413440

約数和(自身を除く): 17624259

約数列:

[1, 3, 7, 9, 17, 21, 47, 49, 51, 59, 63, 119, 141, 147, 153, 177, 329, 357, 413, 423, 441, 531, 799, 833, 987, 1003, 1071, 1239, 2303, 2397, 2499, 2773, 2891, 2961, 3009, 3717, 5593, 6909, 7021, 7191, 7497, 8319, 8673, 9027, 16779, 19411, 20727, 21063, 24957, 26019, 39151, 47141, 49147, 50337, 58233, 63189, 117453, 135877, 141423, 147441, 174699, 329987, 352359, 407631, 424269, 442323, 989961, 1222893, 2309909, 2969883, 6929727, 20789181]

約数ペア:

[(1, 20789181), (3, 6929727), (7, 2969883), (9, 2309909), (17, 1222893), (21, 989961), (47, 442323), (49, 424269), (51, 407631), (59, 352359), (63, 329987), (119, 174699), (141, 147441), (147, 141423), (153, 135877), (177, 117453), (329, 63189), (357, 58233), (413, 50337), (423, 49147), (441, 47141), (531, 39151), (799, 26019), (833, 24957), (987, 21063), (1003, 20727), (1071, 19411), (1239, 16779), (2303, 9027), (2397, 8673), (2499, 8319), (2773, 7497), (2891, 7191), (2961, 7021), (3009, 6909), (3717, 5593)]