21493570

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{139}}^1$

素因数の和:247

約数の個数: 48

約数和(自身を含む): 45501120

約数和(自身を除く): 24007550

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 70, 94, 139, 235, 278, 329, 470, 658, 695, 973, 1390, 1645, 1946, 2209, 3290, 4418, 4865, 6533, 9730, 11045, 13066, 15463, 22090, 30926, 32665, 45731, 65330, 77315, 91462, 154630, 228655, 307051, 457310, 614102, 1535255, 2149357, 3070510, 4298714, 10746785, 21493570]

約数ペア:

[(1, 21493570), (2, 10746785), (5, 4298714), (7, 3070510), (10, 2149357), (14, 1535255), (35, 614102), (47, 457310), (70, 307051), (94, 228655), (139, 154630), (235, 91462), (278, 77315), (329, 65330), (470, 45731), (658, 32665), (695, 30926), (973, 22090), (1390, 15463), (1645, 13066), (1946, 11045), (2209, 9730), (3290, 6533), (4418, 4865)]