21741819

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:499

約数の個数: 32

約数和(自身を含む): 33343488

約数和(自身を除く): 11601669

約数列:

[1, 3, 11, 31, 33, 53, 93, 159, 341, 401, 583, 1023, 1203, 1643, 1749, 4411, 4929, 12431, 13233, 18073, 21253, 37293, 54219, 63759, 136741, 233783, 410223, 658843, 701349, 1976529, 7247273, 21741819]

約数ペア:

[(1, 21741819), (3, 7247273), (11, 1976529), (31, 701349), (33, 658843), (53, 410223), (93, 233783), (159, 136741), (341, 63759), (401, 54219), (583, 37293), (1023, 21253), (1203, 18073), (1643, 13233), (1749, 12431), (4411, 4929)]