21023750

素因数分解:

$2^1\times 5^4\times {\mathrm{11}}^2\times {\mathrm{139}}^1$

素因数の和:183

約数の個数: 60

約数和(自身を含む): 43626660

約数和(自身を除く): 22602910

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 125, 139, 242, 250, 275, 278, 550, 605, 625, 695, 1210, 1250, 1375, 1390, 1529, 2750, 3025, 3058, 3475, 6050, 6875, 6950, 7645, 13750, 15125, 15290, 16819, 17375, 30250, 33638, 34750, 38225, 75625, 76450, 84095, 86875, 151250, 168190, 173750, 191125, 382250, 420475, 840950, 955625, 1911250, 2102375, 4204750, 10511875, 21023750]

約数ペア:

[(1, 21023750), (2, 10511875), (5, 4204750), (10, 2102375), (11, 1911250), (22, 955625), (25, 840950), (50, 420475), (55, 382250), (110, 191125), (121, 173750), (125, 168190), (139, 151250), (242, 86875), (250, 84095), (275, 76450), (278, 75625), (550, 38225), (605, 34750), (625, 33638), (695, 30250), (1210, 17375), (1250, 16819), (1375, 15290), (1390, 15125), (1529, 13750), (2750, 7645), (3025, 6950), (3058, 6875), (3475, 6050)]