20417985

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{1223}}^1$

素因数の和:1294

約数の個数: 48

約数和(自身を含む): 41243904

約数和(自身を除く): 20825919

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 53, 63, 105, 159, 265, 315, 371, 477, 795, 1113, 1223, 1855, 2385, 3339, 3669, 5565, 6115, 8561, 11007, 16695, 18345, 25683, 42805, 55035, 64819, 77049, 128415, 194457, 324095, 385245, 453733, 583371, 972285, 1361199, 2268665, 2916855, 4083597, 6805995, 20417985]

約数ペア:

[(1, 20417985), (3, 6805995), (5, 4083597), (7, 2916855), (9, 2268665), (15, 1361199), (21, 972285), (35, 583371), (45, 453733), (53, 385245), (63, 324095), (105, 194457), (159, 128415), (265, 77049), (315, 64819), (371, 55035), (477, 42805), (795, 25683), (1113, 18345), (1223, 16695), (1855, 11007), (2385, 8561), (3339, 6115), (3669, 5565)]