20689880

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{523}}^1$

素因数の和:600

約数の個数: 64

約数和(自身を含む): 49800960

約数和(自身を除く): 29111080

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 43, 46, 86, 92, 115, 172, 184, 215, 230, 344, 430, 460, 523, 860, 920, 989, 1046, 1720, 1978, 2092, 2615, 3956, 4184, 4945, 5230, 7912, 9890, 10460, 12029, 19780, 20920, 22489, 24058, 39560, 44978, 48116, 60145, 89956, 96232, 112445, 120290, 179912, 224890, 240580, 449780, 481160, 517247, 899560, 1034494, 2068988, 2586235, 4137976, 5172470, 10344940, 20689880]

約数ペア:

[(1, 20689880), (2, 10344940), (4, 5172470), (5, 4137976), (8, 2586235), (10, 2068988), (20, 1034494), (23, 899560), (40, 517247), (43, 481160), (46, 449780), (86, 240580), (92, 224890), (115, 179912), (172, 120290), (184, 112445), (215, 96232), (230, 89956), (344, 60145), (430, 48116), (460, 44978), (523, 39560), (860, 24058), (920, 22489), (989, 20920), (1046, 19780), (1720, 12029), (1978, 10460), (2092, 9890), (2615, 7912), (3956, 5230), (4184, 4945)]