21909328

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{311}}^1$

素因数の和:380

約数の個数: 80

約数和(自身を含む): 52925184

約数和(自身を除く): 31015856

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 37, 56, 68, 74, 112, 119, 136, 148, 238, 259, 272, 296, 311, 476, 518, 592, 622, 629, 952, 1036, 1244, 1258, 1904, 2072, 2177, 2488, 2516, 4144, 4354, 4403, 4976, 5032, 5287, 8708, 8806, 10064, 10574, 11507, 17416, 17612, 21148, 23014, 34832, 35224, 37009, 42296, 46028, 70448, 74018, 80549, 84592, 92056, 148036, 161098, 184112, 195619, 296072, 322196, 391238, 592144, 644392, 782476, 1288784, 1369333, 1564952, 2738666, 3129904, 5477332, 10954664, 21909328]

約数ペア:

[(1, 21909328), (2, 10954664), (4, 5477332), (7, 3129904), (8, 2738666), (14, 1564952), (16, 1369333), (17, 1288784), (28, 782476), (34, 644392), (37, 592144), (56, 391238), (68, 322196), (74, 296072), (112, 195619), (119, 184112), (136, 161098), (148, 148036), (238, 92056), (259, 84592), (272, 80549), (296, 74018), (311, 70448), (476, 46028), (518, 42296), (592, 37009), (622, 35224), (629, 34832), (952, 23014), (1036, 21148), (1244, 17612), (1258, 17416), (1904, 11507), (2072, 10574), (2177, 10064), (2488, 8806), (2516, 8708), (4144, 5287), (4354, 5032), (4403, 4976)]