21900700

素因数分解:

$2^2\times 5^2\times {\mathrm{389}}^1\times {\mathrm{563}}^1$

素因数の和:966

約数の個数: 36

約数和(自身を含む): 47731320

約数和(自身を除く): 25830620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 389, 563, 778, 1126, 1556, 1945, 2252, 2815, 3890, 5630, 7780, 9725, 11260, 14075, 19450, 28150, 38900, 56300, 219007, 438014, 876028, 1095035, 2190070, 4380140, 5475175, 10950350, 21900700]

約数ペア:

[(1, 21900700), (2, 10950350), (4, 5475175), (5, 4380140), (10, 2190070), (20, 1095035), (25, 876028), (50, 438014), (100, 219007), (389, 56300), (563, 38900), (778, 28150), (1126, 19450), (1556, 14075), (1945, 11260), (2252, 9725), (2815, 7780), (3890, 5630)]