19717725

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 34908480

約数和(自身を除く): 15190755

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 101, 137, 285, 303, 411, 475, 505, 685, 1425, 1515, 1919, 2055, 2525, 2603, 3425, 5757, 7575, 7809, 9595, 10275, 13015, 13837, 28785, 39045, 41511, 47975, 65075, 69185, 143925, 195225, 207555, 262903, 345925, 788709, 1037775, 1314515, 3943545, 6572575, 19717725]

約数ペア:

[(1, 19717725), (3, 6572575), (5, 3943545), (15, 1314515), (19, 1037775), (25, 788709), (57, 345925), (75, 262903), (95, 207555), (101, 195225), (137, 143925), (285, 69185), (303, 65075), (411, 47975), (475, 41511), (505, 39045), (685, 28785), (1425, 13837), (1515, 13015), (1919, 10275), (2055, 9595), (2525, 7809), (2603, 7575), (3425, 5757)]