21638841

素因数分解:

$3^1\times 7^3\times {\mathrm{17}}^1\times {\mathrm{1237}}^1$

素因数の和:1278

約数の個数: 32

約数和(自身を含む): 35654400

約数和(自身を除く): 14015559

約数列:

[1, 3, 7, 17, 21, 49, 51, 119, 147, 343, 357, 833, 1029, 1237, 2499, 3711, 5831, 8659, 17493, 21029, 25977, 60613, 63087, 147203, 181839, 424291, 441609, 1030421, 1272873, 3091263, 7212947, 21638841]

約数ペア:

[(1, 21638841), (3, 7212947), (7, 3091263), (17, 1272873), (21, 1030421), (49, 441609), (51, 424291), (119, 181839), (147, 147203), (343, 63087), (357, 60613), (833, 25977), (1029, 21029), (1237, 17493), (2499, 8659), (3711, 5831)]