21816880

素因数分解:

$2^4\times 5^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{167}}^1$

素因数の和:274

約数の個数: 80

約数和(自身を含む): 53996544

約数和(自身を除く): 32179664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 40, 46, 71, 80, 92, 115, 142, 167, 184, 230, 284, 334, 355, 368, 460, 568, 668, 710, 835, 920, 1136, 1336, 1420, 1633, 1670, 1840, 2672, 2840, 3266, 3340, 3841, 5680, 6532, 6680, 7682, 8165, 11857, 13064, 13360, 15364, 16330, 19205, 23714, 26128, 30728, 32660, 38410, 47428, 59285, 61456, 65320, 76820, 94856, 118570, 130640, 153640, 189712, 237140, 272711, 307280, 474280, 545422, 948560, 1090844, 1363555, 2181688, 2727110, 4363376, 5454220, 10908440, 21816880]

約数ペア:

[(1, 21816880), (2, 10908440), (4, 5454220), (5, 4363376), (8, 2727110), (10, 2181688), (16, 1363555), (20, 1090844), (23, 948560), (40, 545422), (46, 474280), (71, 307280), (80, 272711), (92, 237140), (115, 189712), (142, 153640), (167, 130640), (184, 118570), (230, 94856), (284, 76820), (334, 65320), (355, 61456), (368, 59285), (460, 47428), (568, 38410), (668, 32660), (710, 30728), (835, 26128), (920, 23714), (1136, 19205), (1336, 16330), (1420, 15364), (1633, 13360), (1670, 13064), (1840, 11857), (2672, 8165), (2840, 7682), (3266, 6680), (3340, 6532), (3841, 5680)]