21509800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{8273}}^1$

素因数の和:8302

約数の個数: 48

約数和(自身を含む): 53863740

約数和(自身を除く): 32353940

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 8273, 16546, 33092, 41365, 66184, 82730, 107549, 165460, 206825, 215098, 330920, 413650, 430196, 537745, 827300, 860392, 1075490, 1654600, 2150980, 2688725, 4301960, 5377450, 10754900, 21509800]

約数ペア:

[(1, 21509800), (2, 10754900), (4, 5377450), (5, 4301960), (8, 2688725), (10, 2150980), (13, 1654600), (20, 1075490), (25, 860392), (26, 827300), (40, 537745), (50, 430196), (52, 413650), (65, 330920), (100, 215098), (104, 206825), (130, 165460), (200, 107549), (260, 82730), (325, 66184), (520, 41365), (650, 33092), (1300, 16546), (2600, 8273)]