21473907

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{661}}^1$

素因数の和:708

約数の個数: 48

約数和(自身を含む): 38035872

約数和(自身を除く): 16561965

約数列:

[1, 3, 7, 13, 17, 21, 39, 49, 51, 91, 119, 147, 221, 273, 357, 637, 661, 663, 833, 1547, 1911, 1983, 2499, 4627, 4641, 8593, 10829, 11237, 13881, 25779, 32389, 32487, 33711, 60151, 78659, 97167, 146081, 180453, 235977, 421057, 438243, 550613, 1022567, 1263171, 1651839, 3067701, 7157969, 21473907]

約数ペア:

[(1, 21473907), (3, 7157969), (7, 3067701), (13, 1651839), (17, 1263171), (21, 1022567), (39, 550613), (49, 438243), (51, 421057), (91, 235977), (119, 180453), (147, 146081), (221, 97167), (273, 78659), (357, 60151), (637, 33711), (661, 32487), (663, 32389), (833, 25779), (1547, 13881), (1911, 11237), (1983, 10829), (2499, 8593), (4627, 4641)]