21008715

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15391}}^1$

素因数の和:15419

約数の個数: 32

約数和(自身を含む): 41373696

約数和(自身を除く): 20364981

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15391, 46173, 76955, 107737, 200083, 230865, 323211, 538685, 600249, 1000415, 1400581, 1616055, 3001245, 4201743, 7002905, 21008715]

約数ペア:

[(1, 21008715), (3, 7002905), (5, 4201743), (7, 3001245), (13, 1616055), (15, 1400581), (21, 1000415), (35, 600249), (39, 538685), (65, 323211), (91, 230865), (105, 200083), (195, 107737), (273, 76955), (455, 46173), (1365, 15391)]