18408880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{463}}^1$

素因数の和:554

約数の個数: 80

約数和(自身を含む): 49711104

約数和(自身を除く): 31302224

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 71, 80, 112, 140, 142, 280, 284, 355, 463, 497, 560, 568, 710, 926, 994, 1136, 1420, 1852, 1988, 2315, 2485, 2840, 3241, 3704, 3976, 4630, 4970, 5680, 6482, 7408, 7952, 9260, 9940, 12964, 16205, 18520, 19880, 25928, 32410, 32873, 37040, 39760, 51856, 64820, 65746, 129640, 131492, 164365, 230111, 259280, 262984, 328730, 460222, 525968, 657460, 920444, 1150555, 1314920, 1840888, 2301110, 2629840, 3681776, 4602220, 9204440, 18408880]

約数ペア:

[(1, 18408880), (2, 9204440), (4, 4602220), (5, 3681776), (7, 2629840), (8, 2301110), (10, 1840888), (14, 1314920), (16, 1150555), (20, 920444), (28, 657460), (35, 525968), (40, 460222), (56, 328730), (70, 262984), (71, 259280), (80, 230111), (112, 164365), (140, 131492), (142, 129640), (280, 65746), (284, 64820), (355, 51856), (463, 39760), (497, 37040), (560, 32873), (568, 32410), (710, 25928), (926, 19880), (994, 18520), (1136, 16205), (1420, 12964), (1852, 9940), (1988, 9260), (2315, 7952), (2485, 7408), (2840, 6482), (3241, 5680), (3704, 4970), (3976, 4630)]