21753500

素因数分解:

$2^2\times 5^3\times {\mathrm{139}}^1\times {\mathrm{313}}^1$

素因数の和:471

約数の個数: 48

約数和(自身を含む): 48004320

約数和(自身を除く): 26250820

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 139, 250, 278, 313, 500, 556, 626, 695, 1252, 1390, 1565, 2780, 3130, 3475, 6260, 6950, 7825, 13900, 15650, 17375, 31300, 34750, 39125, 43507, 69500, 78250, 87014, 156500, 174028, 217535, 435070, 870140, 1087675, 2175350, 4350700, 5438375, 10876750, 21753500]

約数ペア:

[(1, 21753500), (2, 10876750), (4, 5438375), (5, 4350700), (10, 2175350), (20, 1087675), (25, 870140), (50, 435070), (100, 217535), (125, 174028), (139, 156500), (250, 87014), (278, 78250), (313, 69500), (500, 43507), (556, 39125), (626, 34750), (695, 31300), (1252, 17375), (1390, 15650), (1565, 13900), (2780, 7825), (3130, 6950), (3475, 6260)]