21089240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27749}}^1$

素因数の和:27779

約数の個数: 32

約数和(自身を含む): 49950000

約数和(自身を除く): 28860760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27749, 55498, 110996, 138745, 221992, 277490, 527231, 554980, 1054462, 1109960, 2108924, 2636155, 4217848, 5272310, 10544620, 21089240]

約数ペア:

[(1, 21089240), (2, 10544620), (4, 5272310), (5, 4217848), (8, 2636155), (10, 2108924), (19, 1109960), (20, 1054462), (38, 554980), (40, 527231), (76, 277490), (95, 221992), (152, 138745), (190, 110996), (380, 55498), (760, 27749)]