21720135

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4483}}^1$

素因数の和:4527

約数の個数: 32

約数和(自身を含む): 38741760

約数和(自身を除く): 17021625

約数列:

[1, 3, 5, 15, 17, 19, 51, 57, 85, 95, 255, 285, 323, 969, 1615, 4483, 4845, 13449, 22415, 67245, 76211, 85177, 228633, 255531, 381055, 425885, 1143165, 1277655, 1448009, 4344027, 7240045, 21720135]

約数ペア:

[(1, 21720135), (3, 7240045), (5, 4344027), (15, 1448009), (17, 1277655), (19, 1143165), (51, 425885), (57, 381055), (85, 255531), (95, 228633), (255, 85177), (285, 76211), (323, 67245), (969, 22415), (1615, 13449), (4483, 4845)]