21015680

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{4691}}^1$

素因数の和:4717

約数の個数: 64

約数和(自身を含む): 57430080

約数和(自身を除く): 36414400

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 280, 320, 448, 560, 640, 896, 1120, 2240, 4480, 4691, 9382, 18764, 23455, 32837, 37528, 46910, 65674, 75056, 93820, 131348, 150112, 164185, 187640, 262696, 300224, 328370, 375280, 525392, 600448, 656740, 750560, 1050784, 1313480, 1501120, 2101568, 2626960, 3002240, 4203136, 5253920, 10507840, 21015680]

約数ペア:

[(1, 21015680), (2, 10507840), (4, 5253920), (5, 4203136), (7, 3002240), (8, 2626960), (10, 2101568), (14, 1501120), (16, 1313480), (20, 1050784), (28, 750560), (32, 656740), (35, 600448), (40, 525392), (56, 375280), (64, 328370), (70, 300224), (80, 262696), (112, 187640), (128, 164185), (140, 150112), (160, 131348), (224, 93820), (280, 75056), (320, 65674), (448, 46910), (560, 37528), (640, 32837), (896, 23455), (1120, 18764), (2240, 9382), (4480, 4691)]