20643105

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{89}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 39000960

約数和(自身を除く): 18357855

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 89, 105, 141, 235, 267, 329, 445, 623, 705, 987, 1335, 1645, 1869, 2209, 3115, 4183, 4935, 6627, 9345, 11045, 12549, 15463, 20915, 29281, 33135, 46389, 62745, 77315, 87843, 146405, 196601, 231945, 439215, 589803, 983005, 1376207, 2949015, 4128621, 6881035, 20643105]

約数ペア:

[(1, 20643105), (3, 6881035), (5, 4128621), (7, 2949015), (15, 1376207), (21, 983005), (35, 589803), (47, 439215), (89, 231945), (105, 196601), (141, 146405), (235, 87843), (267, 77315), (329, 62745), (445, 46389), (623, 33135), (705, 29281), (987, 20915), (1335, 15463), (1645, 12549), (1869, 11045), (2209, 9345), (3115, 6627), (4183, 4935)]