20845660

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4987}}^1$

素因数の和:5026

約数の個数: 48

約数和(自身を含む): 50279040

約数和(自身を除く): 29433380

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 380, 418, 836, 1045, 2090, 4180, 4987, 9974, 19948, 24935, 49870, 54857, 94753, 99740, 109714, 189506, 219428, 274285, 379012, 473765, 548570, 947530, 1042283, 1097140, 1895060, 2084566, 4169132, 5211415, 10422830, 20845660]

約数ペア:

[(1, 20845660), (2, 10422830), (4, 5211415), (5, 4169132), (10, 2084566), (11, 1895060), (19, 1097140), (20, 1042283), (22, 947530), (38, 548570), (44, 473765), (55, 379012), (76, 274285), (95, 219428), (110, 189506), (190, 109714), (209, 99740), (220, 94753), (380, 54857), (418, 49870), (836, 24935), (1045, 19948), (2090, 9974), (4180, 4987)]