21345705

素因数分解:

$3^2\times 5^1\times {\mathrm{347}}^1\times {\mathrm{1367}}^1$

素因数の和:1725

約数の個数: 24

約数和(自身を含む): 37132992

約数和(自身を除く): 15787287

約数列:

[1, 3, 5, 9, 15, 45, 347, 1041, 1367, 1735, 3123, 4101, 5205, 6835, 12303, 15615, 20505, 61515, 474349, 1423047, 2371745, 4269141, 7115235, 21345705]

約数ペア:

[(1, 21345705), (3, 7115235), (5, 4269141), (9, 2371745), (15, 1423047), (45, 474349), (347, 61515), (1041, 20505), (1367, 15615), (1735, 12303), (3123, 6835), (4101, 5205)]