871220

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{127}}^1$

素因数の和:157

約数の個数: 48

約数和(自身を含む): 2150400

約数和(自身を除く): 1279180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 127, 140, 196, 245, 254, 343, 490, 508, 635, 686, 889, 980, 1270, 1372, 1715, 1778, 2540, 3430, 3556, 4445, 6223, 6860, 8890, 12446, 17780, 24892, 31115, 43561, 62230, 87122, 124460, 174244, 217805, 435610, 871220]

約数ペア:

[(1, 871220), (2, 435610), (4, 217805), (5, 174244), (7, 124460), (10, 87122), (14, 62230), (20, 43561), (28, 31115), (35, 24892), (49, 17780), (70, 12446), (98, 8890), (127, 6860), (140, 6223), (196, 4445), (245, 3556), (254, 3430), (343, 2540), (490, 1778), (508, 1715), (635, 1372), (686, 1270), (889, 980)]