21178946885

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^1\times {\mathrm{3881}}^1$

素因数の和:4062

約数の個数: 64

約数和(自身を含む): 29515622400

約数和(自身を除く): 8336675515

約数列:

[1, 5, 17, 19, 31, 85, 95, 109, 155, 323, 527, 545, 589, 1615, 1853, 2071, 2635, 2945, 3379, 3881, 9265, 10013, 10355, 16895, 19405, 35207, 50065, 57443, 64201, 65977, 73739, 120311, 176035, 287215, 321005, 329885, 368695, 423029, 601555, 1091417, 1253563, 2045287, 2115145, 2285909, 5457085, 6267815, 7191493, 8037551, 10226435, 11429545, 13113899, 35957465, 38860453, 40187755, 65569495, 136638367, 194302265, 222936283, 249164081, 683191835, 1114681415, 1245820405, 4235789377, 21178946885]

約数ペア:

[(1, 21178946885), (5, 4235789377), (17, 1245820405), (19, 1114681415), (31, 683191835), (85, 249164081), (95, 222936283), (109, 194302265), (155, 136638367), (323, 65569495), (527, 40187755), (545, 38860453), (589, 35957465), (1615, 13113899), (1853, 11429545), (2071, 10226435), (2635, 8037551), (2945, 7191493), (3379, 6267815), (3881, 5457085), (9265, 2285909), (10013, 2115145), (10355, 2045287), (16895, 1253563), (19405, 1091417), (35207, 601555), (50065, 423029), (57443, 368695), (64201, 329885), (65977, 321005), (73739, 287215), (120311, 176035)]