21295815

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{3631}}^1$

素因数の和:3679

約数の個数: 32

約数和(自身を含む): 37656576

約数和(自身を除く): 16360761

約数列:

[1, 3, 5, 15, 17, 23, 51, 69, 85, 115, 255, 345, 391, 1173, 1955, 3631, 5865, 10893, 18155, 54465, 61727, 83513, 185181, 250539, 308635, 417565, 925905, 1252695, 1419721, 4259163, 7098605, 21295815]

約数ペア:

[(1, 21295815), (3, 7098605), (5, 4259163), (15, 1419721), (17, 1252695), (23, 925905), (51, 417565), (69, 308635), (85, 250539), (115, 185181), (255, 83513), (345, 61727), (391, 54465), (1173, 18155), (1955, 10893), (3631, 5865)]