21268480

素因数分解:

$2^{11}\times 5^1\times {\mathrm{31}}^1\times {\mathrm{67}}^1$

素因数の和:125

約数の個数: 96

約数和(自身を含む): 53464320

約数和(自身を除く): 32195840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 67, 80, 124, 128, 134, 155, 160, 248, 256, 268, 310, 320, 335, 496, 512, 536, 620, 640, 670, 992, 1024, 1072, 1240, 1280, 1340, 1984, 2048, 2077, 2144, 2480, 2560, 2680, 3968, 4154, 4288, 4960, 5120, 5360, 7936, 8308, 8576, 9920, 10240, 10385, 10720, 15872, 16616, 17152, 19840, 20770, 21440, 31744, 33232, 34304, 39680, 41540, 42880, 63488, 66464, 68608, 79360, 83080, 85760, 132928, 137216, 158720, 166160, 171520, 265856, 317440, 332320, 343040, 531712, 664640, 686080, 1063424, 1329280, 2126848, 2658560, 4253696, 5317120, 10634240, 21268480]

約数ペア:

[(1, 21268480), (2, 10634240), (4, 5317120), (5, 4253696), (8, 2658560), (10, 2126848), (16, 1329280), (20, 1063424), (31, 686080), (32, 664640), (40, 531712), (62, 343040), (64, 332320), (67, 317440), (80, 265856), (124, 171520), (128, 166160), (134, 158720), (155, 137216), (160, 132928), (248, 85760), (256, 83080), (268, 79360), (310, 68608), (320, 66464), (335, 63488), (496, 42880), (512, 41540), (536, 39680), (620, 34304), (640, 33232), (670, 31744), (992, 21440), (1024, 20770), (1072, 19840), (1240, 17152), (1280, 16616), (1340, 15872), (1984, 10720), (2048, 10385), (2077, 10240), (2144, 9920), (2480, 8576), (2560, 8308), (2680, 7936), (3968, 5360), (4154, 5120), (4288, 4960)]