21381560

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{14447}}^1$

素因数の和:14495

約数の個数: 32

約数和(自身を含む): 49412160

約数和(自身を除く): 28030600

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 148, 185, 296, 370, 740, 1480, 14447, 28894, 57788, 72235, 115576, 144470, 288940, 534539, 577880, 1069078, 2138156, 2672695, 4276312, 5345390, 10690780, 21381560]

約数ペア:

[(1, 21381560), (2, 10690780), (4, 5345390), (5, 4276312), (8, 2672695), (10, 2138156), (20, 1069078), (37, 577880), (40, 534539), (74, 288940), (148, 144470), (185, 115576), (296, 72235), (370, 57788), (740, 28894), (1480, 14447)]