21000427974

素因数分解:

$2^1\times 3^2\times {\mathrm{107}}^1\times {\mathrm{499}}^1\times {\mathrm{21851}}^1$

素因数の和:22465

約数の個数: 48

約数和(自身を含む): 46020312000

約数和(自身を除く): 25019884026

約数列:

[1, 2, 3, 6, 9, 18, 107, 214, 321, 499, 642, 963, 998, 1497, 1926, 2994, 4491, 8982, 21851, 43702, 53393, 65553, 106786, 131106, 160179, 196659, 320358, 393318, 480537, 961074, 2338057, 4676114, 7014171, 10903649, 14028342, 21042513, 21807298, 32710947, 42085026, 65421894, 98132841, 196265682, 1166690443, 2333380886, 3500071329, 7000142658, 10500213987, 21000427974]

約数ペア:

[(1, 21000427974), (2, 10500213987), (3, 7000142658), (6, 3500071329), (9, 2333380886), (18, 1166690443), (107, 196265682), (214, 98132841), (321, 65421894), (499, 42085026), (642, 32710947), (963, 21807298), (998, 21042513), (1497, 14028342), (1926, 10903649), (2994, 7014171), (4491, 4676114), (8982, 2338057), (21851, 961074), (43702, 480537), (53393, 393318), (65553, 320358), (106786, 196659), (131106, 160179)]