21890240

素因数分解:

$2^6\times 5^1\times {\mathrm{67}}^1\times {\mathrm{1021}}^1$

素因数の和:1105

約数の個数: 56

約数和(自身を含む): 52955952

約数和(自身を除く): 31065712

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 134, 160, 268, 320, 335, 536, 670, 1021, 1072, 1340, 2042, 2144, 2680, 4084, 4288, 5105, 5360, 8168, 10210, 10720, 16336, 20420, 21440, 32672, 40840, 65344, 68407, 81680, 136814, 163360, 273628, 326720, 342035, 547256, 684070, 1094512, 1368140, 2189024, 2736280, 4378048, 5472560, 10945120, 21890240]

約数ペア:

[(1, 21890240), (2, 10945120), (4, 5472560), (5, 4378048), (8, 2736280), (10, 2189024), (16, 1368140), (20, 1094512), (32, 684070), (40, 547256), (64, 342035), (67, 326720), (80, 273628), (134, 163360), (160, 136814), (268, 81680), (320, 68407), (335, 65344), (536, 40840), (670, 32672), (1021, 21440), (1072, 20420), (1340, 16336), (2042, 10720), (2144, 10210), (2680, 8168), (4084, 5360), (4288, 5105)]