20980688

素因数分解:

$2^4\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{439}}^1$

素因数の和:579

約数の個数: 40

約数和(自身を含む): 42556800

約数和(自身を除く): 21576112

約数列:

[1, 2, 4, 8, 16, 29, 58, 103, 116, 206, 232, 412, 439, 464, 824, 878, 1648, 1756, 2987, 3512, 5974, 7024, 11948, 12731, 23896, 25462, 45217, 47792, 50924, 90434, 101848, 180868, 203696, 361736, 723472, 1311293, 2622586, 5245172, 10490344, 20980688]

約数ペア:

[(1, 20980688), (2, 10490344), (4, 5245172), (8, 2622586), (16, 1311293), (29, 723472), (58, 361736), (103, 203696), (116, 180868), (206, 101848), (232, 90434), (412, 50924), (439, 47792), (464, 45217), (824, 25462), (878, 23896), (1648, 12731), (1756, 11948), (2987, 7024), (3512, 5974)]