20909025

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{73}}^1$

素因数の和:175

約数の個数: 72

約数和(自身を含む): 40557920

約数和(自身を除く): 19648895

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 67, 73, 75, 95, 171, 201, 219, 225, 285, 335, 365, 475, 603, 657, 855, 1005, 1095, 1273, 1387, 1425, 1675, 1825, 3015, 3285, 3819, 4161, 4275, 4891, 5025, 5475, 6365, 6935, 11457, 12483, 14673, 15075, 16425, 19095, 20805, 24455, 31825, 34675, 44019, 57285, 62415, 73365, 92929, 95475, 104025, 122275, 220095, 278787, 286425, 312075, 366825, 464645, 836361, 1100475, 1393935, 2323225, 4181805, 6969675, 20909025]

約数ペア:

[(1, 20909025), (3, 6969675), (5, 4181805), (9, 2323225), (15, 1393935), (19, 1100475), (25, 836361), (45, 464645), (57, 366825), (67, 312075), (73, 286425), (75, 278787), (95, 220095), (171, 122275), (201, 104025), (219, 95475), (225, 92929), (285, 73365), (335, 62415), (365, 57285), (475, 44019), (603, 34675), (657, 31825), (855, 24455), (1005, 20805), (1095, 19095), (1273, 16425), (1387, 15075), (1425, 14673), (1675, 12483), (1825, 11457), (3015, 6935), (3285, 6365), (3819, 5475), (4161, 5025), (4275, 4891)]