21155800

素因数分解:

$2^3\times 5^2\times {\mathrm{139}}^1\times {\mathrm{761}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 49606200

約数和(自身を除く): 28450400

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 139, 200, 278, 556, 695, 761, 1112, 1390, 1522, 2780, 3044, 3475, 3805, 5560, 6088, 6950, 7610, 13900, 15220, 19025, 27800, 30440, 38050, 76100, 105779, 152200, 211558, 423116, 528895, 846232, 1057790, 2115580, 2644475, 4231160, 5288950, 10577900, 21155800]

約数ペア:

[(1, 21155800), (2, 10577900), (4, 5288950), (5, 4231160), (8, 2644475), (10, 2115580), (20, 1057790), (25, 846232), (40, 528895), (50, 423116), (100, 211558), (139, 152200), (200, 105779), (278, 76100), (556, 38050), (695, 30440), (761, 27800), (1112, 19025), (1390, 15220), (1522, 13900), (2780, 7610), (3044, 6950), (3475, 6088), (3805, 5560)]