21220000

素因数分解:

$2^5\times 5^4\times {\mathrm{1061}}^1$

素因数の和:1091

約数の個数: 60

約数和(自身を含む): 52253586

約数和(自身を除く): 31033586

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1061, 1250, 2000, 2122, 2500, 4000, 4244, 5000, 5305, 8488, 10000, 10610, 16976, 20000, 21220, 26525, 33952, 42440, 53050, 84880, 106100, 132625, 169760, 212200, 265250, 424400, 530500, 663125, 848800, 1061000, 1326250, 2122000, 2652500, 4244000, 5305000, 10610000, 21220000]

約数ペア:

[(1, 21220000), (2, 10610000), (4, 5305000), (5, 4244000), (8, 2652500), (10, 2122000), (16, 1326250), (20, 1061000), (25, 848800), (32, 663125), (40, 530500), (50, 424400), (80, 265250), (100, 212200), (125, 169760), (160, 132625), (200, 106100), (250, 84880), (400, 53050), (500, 42440), (625, 33952), (800, 26525), (1000, 21220), (1061, 20000), (1250, 16976), (2000, 10610), (2122, 10000), (2500, 8488), (4000, 5305), (4244, 5000)]